Be wary. The Raw questions collected here are of variable quality and some are ambiguous or may even have the wrong answer suggested. Use these as a guide for the types of information to be covered but you'd better make sure you understand the information rather than just memorizing these questions!back to BA3300 homepage |
Discussion Board
Current Forum: exam 1 suggested questions Read 58 times
Date: Wed Feb 18 2004 12:52 pm
Author: Banis, Robert <bud_banis@umsl.edu>
Subject: respond to this message to add your questions
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respond to this message to add your questions
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Current Forum: exam 1 suggested questions Read 25 times
Date: Fri Feb 20 2004 8:10 pm
Author: Vincenz, Brian <bwv882@studentmail.umsl.edu>
Subject: Exam 1 questions
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1) If calculations yeild an f score fo 1.01 and f critical is 1.3, you
should:
A. Perform another f-test
B. Perform a t-test assuming equal variances ***
C. Perform a paired t-test
D. Perform a t-test assuming unequal variances
E. Need more information
2) When determining who types faster, males or females, the following
test should be used.
A. One-tail test ***
B. No-tail test
C. Two-tail test
D. Both a one and two-tail test
E. No need to test, males type faster than females
3) If Ho cannot be rejected, one should
A. Accept Ha
B. Reject the null hypothesis
C. Form a new hypothesis
D. Test again
E. Accept the null hypothesis ***
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Current Forum: exam 1 suggested questions Read 17 times
Date: Mon Feb 23 2004 4:33 pm
Author: Schimmel, Christopher <clsn83@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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1)The question of whether an observed sample mean is in the rejection
region can be answered by computing
a) a t-test
b) a test statistic******
c) significance level
d) alpha level
e) none of the above
2)The value of the test statistic that defines the rejection region
is known as:
a) reject area
b) area of error
c) p-value
d) critical value******
e) none of the above
3) which test is used to compare variances:
a) two-tailed test
b) one-tailed test
c) t-test
d) f-test******
e) alpha
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Current Forum: exam 1 suggested questions Read 14 times
Date: Mon Feb 23 2004 5:25 pm
Author: Webster, Kenneth <kew4h9@studentmail.umsl.edu>
Subject: exam questions
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1)Given an alpa=.05 which of the following p-values would you reject
the null hypothesis?
a. p-value= .055
b. p-value= .10
c. p-value= .01 *****
d. p-value= .75
e. p-value= .6
2)Z is equal to:
a. (normal random variable)- (mean)
------------------------------- ******
standard deviation
b. mean - (norm. rand. var.)
-------------------------
(std. dev. )
c. (norm. rand. var.) - (mean)
---------------------------
2(std. dev)
d. 2(std dev)- (mean)
------------------
norm. rand. var.
e. mean/std dev.
3) mean=80 std dev= 1
What is the z for random variable of 82?
a. 2 *****
b. 1.5
c. 3
d. 1
e. 0
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Current Forum: exam 1 suggested questions Read 15 times
Date: Mon Feb 23 2004 7:07 pm
Author: Pendleton, Ryan <rmp91d@studentmail.umsl.edu>
Subject: exam questions
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1) A test statistics
a)is a fixed probability of wrongly rejecting the null hypothesis Ho, if it is true.
b)is the probability of getting a critical value as extreme as or more extreme than that observed by chance alone, if the null hypothesis is true.
c)is the value used to decide whether or not the null hypothesis should be rejected in a hypothesis test.*
d) is a hypothesis test for answering questions about the mean where the data are collected form two random samples of independent observations, each from an underlying normal distribution.
e)is a hypothesis test for answering questions about the mean with 100%
confidence.
2)A type II error occurs if
a) we accept Ho when Ha is true.*
b) we reject Ho when Ho is true.
c) we reject Ho and Ha.
d) the level of significance is greater than .01.
e) the probability of Ho occurring is equal to the probability of Ha
occurring.
3)A confidence interval
a) are the lower and upper values that define a range.
b) = (1-theta)
c) is less informative than hypothesis testing where Ho is accepted or rejected.
d) that includes zero implies that there is a significant difference between the means of the two tested populations.
e) gives an estimated range of values which is likely to include an
unknown population parameter.*
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Current Forum: exam 1 suggested questions Read 17 times
Date: Mon Feb 23 2004 11:31 pm
Author: Manhal, Angela <almwv9@studentmail.umsl.edu>
Subject: Exam 1 Questions
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1.) The test scores of 5 students were:
165, 175, 176, 159, 170
The sample mean and sample median are:
a) 176, 176
b) 169, 176
c) 170, 169
d) 170, 170
e) 169, 170 ****
2.) In a study of the genetic pattern of gender, a random sample of
100 had 60 males and 40 females. We are testing if the pattern favors males.
The p-value for this test is:
a) 0.0228 ****
b) 0.0114
c) 0.0456
d) .94772
e) 0.4772
3.) In a statistical test of hypothesis, what happens to the rejection
region when alpha is reduced?
a) The rejection region is unaltered.
b) The rejection region is increased in size.
c) The rejection region is reduced in size. ****
d) The answer depends on the value of Beta.
e) The answer depends on the form of the alternative hypothesis.
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Current Forum: exam 1 suggested questions Read 13 times
Date: Tue Feb 24 2004 12:04 pm
Author: Shamsi, Mohammad <aasz67@studentmail.umsl.edu>
Subject: exam 1 questions
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1) When determining if males smoke more or less than females, you should
use the following test:
A. Two tail test ***
B. F-test
C. T-test
D. One tail test
E. Need more info
2) When comparing means of two distributions, you should use the following
test.
A. Z-test
B. F-test
C. One tail test
D. t-test ***
E. Two tail test
3) Ha represents what in statistics?
A) Null hypothesis
B) The data which will be analyzed
C) The alpha value
D) Alternative hypothesis ***
E) Number of tails in the test
E)
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Current Forum: exam 1 suggested questions Read 11 times
Date: Tue Feb 24 2004 12:24 pm
Author: Courtois, Julie <jmcc46@studentmail.umsl.edu>
Subject: Exam 1 Questions
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1.) The purpose of statistical inference is:
A.)to find the sample population
B.)to develop estimates and test hypothesis about the characteristics
of a population using information from the sample***
C.)to find the population standard deviation.
D.)to develop a basis to conduct an F-test
E.)to conduct simple random sampling
(answer: B)
2.) The tentative assumption denoted by Ho is called a:
A.)null hypothesis***
B.)data analysis
C.)alternative hypothesis
D.)test statistic
E.)p-value
(answer A)
3.) The p-value for a one-tailed test is always the area:
A.) to the right of the mean
B.) to the left of the mean
C.) from the test statistic toward the rejection tail of the distribution***
D.)half of the area to the right of the test statistic
E.)from the mean toward the rejection tail of the distribution
(answer C)
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Current Forum: exam 1 suggested questions Read 12 times
Date: Tue Feb 24 2004 1:44 pm
Author: Le, Duc <dpl4dc@studentmail.umsl.edu>
Subject: exam 1 questions
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1. data indicates that next summer's cotton yield for a particular farm is predicted by a normal distribution with mean 1000lb. per acres and standard deviation 200. The farm will be profitable if the yields are at least 1500 lb. per acre. What's the probability that the farm will lose money next summer?
a. .8897
b. .9938 #
c. .7675
d. .8873
e. .9567
2. Suppose each year's yields are statistically independent of other
years. What is the probability the farm will lose money two years in a
row?
a. .98763 #
b. .8765
c. .76555
d. .95644
e. .53435
3. Which of these examples is the two tail test?
a. dogs are bigger than cats
b. males and females differ in salary #
c. males are faster than females
d. females are smarter than males
e. males are stronger than females
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Current Forum: exam 1 suggested questions Read 15 times
Date: Tue Feb 24 2004 1:58 pm
Author: Mulherin, Stephanie <smmn83@studentmail.umsl.edu>
Subject: test 1 sample questions
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1. Wich of these are a two- tailed test?
a. do women and men differ in heught?
b. sports cars are faster than minivans
c. softball is harder than baseball
d. b and c are correct
e. none are correct
2.if there is a group of women trying on shoes, their shoe sizes are
5.5, 9, 7, 8, 6.5, 7, 8. what is the sample mean?
a. 6.345
b. 7
c. 4.5
d. 8
e. 7.286
3. what statement constitutes the rejection of a f-test?
a. if the f critical is further out than the f observed
b. if the f critical is the same as the f observed
c. if the f observed is futher out than the f critical
d. if the f observed is negative
e. if the f observed is equal to 0
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Current Forum: exam 1 suggested questions Read 13 times
Date: Tue Feb 24 2004 2:03 pm
Author: Jamaleldine, James <jdjdkc@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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question #1
What do you use to compare two variances?
a. a compas
b. a map.
c. j test
d. pregnacy test
e. none of the above
question #2
What is Robert Banis's nickname?
a. miller
b. heineken
c. bud
d. king cobra
e. becks
question #3
what microsoft tool should you use for business stats?
a. excel
b. word.
c. powerpoint
d. a rocket science device
e. a hammer
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Current Forum: exam 1 suggested questions Read 10 times
Date: Tue Feb 24 2004 2:04 pm
Author: Wehner, Matthew <mrwq58@studentmail.umsl.edu>
Subject: Exam 1 questions
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1) What does alpha equal when you are looking for a 95% confidence interval?
a. .025
b. .01
c. .1
d. 5
e. .05***
2) With a 95% confidence interval in a two-tailed test, what percent
of your sample means would fall outside the interval and below the population
mean?
a. 2.5***
b. 5
c. 1
d. .5
e. 10
3) What does the histogram of sample means look like as you conduct
more random samples of a population and calculate their means?
a. skewed left
b. skewed right
c. normal distribution***
d. sparatic
e. your guess is as good as mine
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Current Forum: exam 1 suggested questions Read 15 times
Date: Tue Feb 24 2004 2:06 pm
Author: Susic, Christopher <cdsbn7@studentmail.umsl.edu>
Subject: test questions
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1. Take a sample of 100 girls and guys. If we want to find which gender
has more blue eyes, do we do a one tail test or a two tail test?
2. How do you take sample names from a word document, place them in
excell and separate the first and last names?
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Current Forum: exam 1 suggested questions Read 12 times
Date: Tue Feb 24 2004 2:11 pm
Author: Nicols, Andrew <acnqm2@studentmail.umsl.edu>
Subject: z value question
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The z value for a 97% confidence interval is
a. 1.88
b. 1.96
c. 2.00
d. 2.17
e. 2.67
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Current Forum: exam 1 suggested questions Read 12 times
Date: Tue Feb 24 2004 2:14 pm
Author: Haacke, Bryon <bch4b5@studentmail.umsl.edu>
Subject: Bryon Haacke - 3 questions
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Bryon Haacke
Student # 1063691
Business Stats Test Questions
1. If two samples have equal variances, which of the following would
be logical to use to analyse them?
A. F-Test
B. Histogram
C. T-test Assuming equal variance
D. Descriptive Statistics
E: T-test Paired two sample for means
2. A tire company claims that the tread on their tires lasts for an
average of 24 months with a standard deviation of 15 days. A recent study
was conducted with a sample of 50 tires and found the mean to be 22.5 months.
Using 95% confidence, what can the researchers conclude?
A. They are 95% sure that the tires will last 22.5 months.
B. They will reject Ho
C. The can neither accept nor reject Ho
D. They will accept Ha
E. Not enough information to ascertain what the researchers will decide.
3. In order to complete a histogram with Excel, you need the origional
data and ________?
A. The Bin Range
B. The F-test Result
C. The Alpha Value
D. The Average of the Data
E. You do not need anything other than the origional data to make a
Histogram.
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Current Forum: exam 1 suggested questions Read 4 times
Date: Tue Feb 24 2004 2:15 pm
Author: Mulherin, Stephanie <smmn83@studentmail.umsl.edu>
Subject: Re: test 1 sample questions
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sorry i forgot to indicate the answers
1. a
2. e
3. c
stephanie
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Current Forum: exam 1 suggested questions Read 3 times
Date: Tue Feb 24 2004 2:19 pm
Author: Jones, Elizabeth <eajm9d@studentmail.umsl.edu>
Subject: mc ?'s
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what is the formula to find a z-score?
A. xbar = sigma xi/n
B. z = xbar - mean/st.dev.
C. z=xbar - mean/st.dev./square root n
D. z = pbar - pknot/st.dev.
E. none of the above
answer B
How do you find the UCL?
A. mean - z-score
B. LCL - mean
C. mean + confidence level
D. SEM + LCL
E. none of the above
answer C.
Pareto means:
A. hello in french
B. sort your data
C. double click
D. sorted histogram
E. none of the above
answer D.
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Current Forum: exam 1 suggested questions Read 4 times
Date: Tue Feb 24 2004 2:20 pm
Author: McDermott, Michael <mpmbp7@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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1) What is a confidence level?
The confidence level is associated with an interval estimate. The interval
estimate is said to be constructed at the 95% confidence level.
2) What test do you use to compare two variances?
A. z test
B. F TEST
C. t test
D. histogram
E. midterm
3) What is a two-tailed test?
A hypothesis test in which rejection of the null hypothesis occurs
for values of the test statistic in either tail of the sampling distribution.
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Current Forum: exam 1 suggested questions Read 4 times
Date: Tue Feb 24 2004 2:23 pm
Author: Alred, Kelley <kda976@studentmail.umsl.edu>
Subject: exam questions
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1. Using a significance level of .05 and a p-value of .015 you would:
a) accept HO
b) reject HO***
c) recalculate the answer using a 99% confidence interval
d) reject HA and fail to reject HO
e) not enough information to conclude anything
2. By computing X-mean/std. dev., you are:
a)conducting a hypothesis test
b)determining the "true" std. dev.
c)taking the distance from the meam and standardizing it***
d)constructing a confidence interval
e)determining alpha
3. A type II error is when:
a) reject HO when HO is true
b) accept HO when HO is true
c) reject HO when HO is false
d) accept HO when HO is false***
e) do nothing
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Current Forum: exam 1 suggested questions Read 4 times
Date: Tue Feb 24 2004 2:27 pm
Author: Tzinberg, Samuel <sat7wb@studentmail.umsl.edu>
Subject: test 1 sample questions
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1. Which test do you use when you have a sample size over 30?
A.z test
B.f test
C.t test **
D.histogram
E.final
2.What test do you use a 95% confidence level.
A.anova single factor
B.anova two-factor with replication
C.f-test two sample for variances
D.descriptive statistics **
E.t-test paired two sample for means
3.Using excel which test has two ranges in the input?
A.anova two-factor without replication
B.anova two-factor with replication
C.f-test two sample for variances **
D.sampling
E.discriptive statistics
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Current Forum: exam 1 suggested questions Read 3 times
Date: Tue Feb 24 2004 2:34 pm
Author: Ellis, Darnell <drey87@studentmail.umsl.edu>
Subject: Questions for Exam 1
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1.) A random sample of n=36 observations is drawn from a population with mean=20 and standard deviation=18. If you repeated this sampling procedure a large number of times, what is the expected mean and standard deviation of the distribution of sample x bars
A.) mean=20 standard deviation=3 *****
B.) mean=20 standard deviation=2
C.) mean=20 standard deviation=4
D.) mean=20 standard deviation=6
2.)The theorem that enables one to use the normal probability distribution
to approximate the sampling distribution of x bar and probability whenever
the same size is large
A.) Distribution theorem
B.) Sampling theorem
C.) Probability theorem
D.) Central limit theorem *****
3.) If you get a F statistic observed of (1.013) and a F critical of (1.292) which t test do you perform
A.) t test assuming equal variances *****
B.) t test assuming unequal variances
C.) do not perform a ttest, difference is too great
D.) none of the above
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Current Forum: exam 1 suggested questions Read 3 times
Date: Tue Feb 24 2004 2:36 pm
Author: Kim, Chang <chk5d3@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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If you have two variables one male and female, how do you find out the
differnce between the 2 variables. Denote the male variable as B3 and the
female variable as C3. What is the most appropriate formula to figure out
the differnce between the 2 variables.
A. C3-B3
B. B3-C3
C. B3+ C3
D. =B3-C3
E. C3 + B3
answer is D
When do descriptive statistics on Microsoft Excel, which of the following do you include
A. the input range only which may include the appriopriate number of
variables.
B. the input range and the ouput range only
C. input range and the appropriate confidence level
D. output range, and the confidence level
E. input range, output range the confidence level and the summary statistics
answer is E
To get the option of having data analyis includes which of the following
steps
A. Go to tools, Addins, and check on analysis tool pack
B. Go to tools, Addins, and check on Solver Add in
C. Go to tools, Addins, and check on Maple Excel Add in
D. Go to tools , Addins ,and check on Look up wizard
E. Go to tools, Addins, and check on Euro currency Tools
answer is A
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Current Forum: exam 1 suggested questions Read 3 times
Date: Tue Feb 24 2004 2:41 pm
Author: Enemark, Tristan <tnexbb@studentmail.umsl.edu>
Subject: Tristan Enemark
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1. An F-Test is used to analyze?
A. Ratio of test failures in the class
* B. Variances
C. Alpha values
D. Means
E. None of the above
2. What function is used to find T-Critical?
A. TDIST
B. T-Test Paired Two Sample for Means
* C. TINV
D. STDEV
E. TTEST
3. What does Descriptive Statistics tell you about the data?
A. Mean
B. Standard Deviation
C. Range
D. Variance
* E. All of the above
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Current Forum: exam 1 suggested questions Read 2 times
Date: Tue Feb 24 2004 4:48 pm
Author: Franceschi, Nicholas <njfq58@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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1) In a one-tailed t-test where the null hypothesis is Ho:u1=u2, what would be an example of the alternate hypothesis?
a)H1:u1=u2
b)H1:u1/u2
c)H1:u1>u2*
d)H1:u1<>u2
e)H1:u1=
2) A study group took an average of a sample of 50 crayfish. With a
population mean of 8cm and a standard deviation of .75cm, whatis the probability
that the mean of this sample would be 7.8cm or less?
a)39%
b)98%
c).4%
d)3%*
e)cannot be calculated
3) If a P-value is <0.01 than the null hypothesis should be?
a)rejected*
b)accepted
c)niether accepted or rejected
d)rewritten
e)accepted, but not with much confidence
a)
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Current Forum: exam 1 suggested questions Read 1 time
Date: Tue Feb 24 2004 10:30 pm
Author: Williams, Betty <bcw50a@studentmail.umsl.edu>
Subject: Re: Exam 1 Questions
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1. Type I error has occured when:
a. Stating null hypothesis is true when false
b. Stating alternative hypothesis is true when false
c. Stating null hypothesis is false when true *********
d. Stating alternative hypothesis is false when true
e. None of the above.
2. PLAR stands for?
a. P is longer than another value when rejected.
b. P is less than alpha then rejected.*********
c. P is last after results.
d. P is the level assumption report
e. none of the above.
3. P-value calculated and is smaller than the significance level
a. the null hypothesis is rejected********
b. the null hypothesis is accepted
c. neither rejected/accepted
d. use alternative hypothesis
e. none of the above
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Current Forum: exam 1 suggested questions Read 2 times
Date: Tue Feb 24 2004 11:55 pm
Author: Tennant, Eric <emtb6e@studentmail.umsl.edu>
Subject: Exam #1 Questions
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When evaluating 50 samples and using a 90% confidance level how many
sampels would you think be outside the upper confidance level and lower
confidance level respestivaly?
A 4
B 20
C 45
D 5*
If you collect more and more ramdom samples how does this effect your
Bell curve?
A lean Right
B lean Left
C become more narrow
D More normal*
E Flatton out
How many values are appropreate for a typical bin range
A 15-20*
B 60-80
C 3-8
D as many as possible
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Current Forum: exam 1 suggested questions Read 1 time
Date: Wed Feb 25 2004 12:27 pm
Author: Susic, Christopher <cdsbn7@studentmail.umsl.edu>
Subject: Test questions
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When testing to see if more girls or guys have blue eyes, you would
use a:
1. one tail test
2. two tail test
3. three tail test
4. four tail test
5. none of the above
In Excel the fastest way to select all the data in a colum is to:
1. hit shift -> and down
2. hit shift down arrow and down
3. hit ctrl down
4. hit backspace <- up
5. none of the above
The mean is:
1. the averege of the data
2. the highest value in the data
3. the middle value in the data
4. the outliners
5. all of the above
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Current Forum: exam 1 suggested questions Read 1 time
Date: Wed Feb 25 2004 6:29 pm
Author: Mueller, Benjamin <bpmf31@studentmail.umsl.edu>
Subject: Re: respond to this message to add your questions
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Correct answers are denoted by **
1. A bussinesses output is predicted to be normally distributed with
a mean of 12,000 units produced per month, with a standard deviation of
2,200 units. What is the chance the company will produce over 14,500 units
next March?
a. 113%
b. 37%
c. 74.9%
d. 12%**
e. 87%
2. A manager was given the test results from a recent "knowledge test" of his 12 biggest sales people. The scores were 95, 44, 78, 87, 98, 92, 58, 56, 78, 82, 51 & 100. What is the mean, median & mode of the test scores?
a. 72.6, 87, 78
b. 87.9, 54, 89
c. 76.6, 80, 78**
d. 80, 78, 73
e. not able to compute
3. The mean score of a normally distributed curve of management and organizational behavior students' test scores was 68, with a standard deviation of 6. Ralph got a 54, and he wants to know how many people scored higher than him. What is the t-score he must use to compute the probability?/
a. -1.75
b. 1.75
c. 2.33**
d. -2.33
e. 2.1
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Current Forum: exam 1 suggested questions Read 1 time
Date: Wed Feb 25 2004 10:05 pm
Author: Puente, Luis <lapade@studentmail.umsl.edu>
Subject: answers are in caps
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1. If we used a 95% confidence interval, and used an interval of 1-3.
what does that mean?
a) that 95% of people should drink between 1 and 3 glasses of water.
b) 95% of all people drink between 1 and 3 glasses of water.
c) THAT WE ARE 95% CONFIDENT THAT ALL PEOPLE DRINK BETWEEN 1 AND 3
GLASSES OF WATER A DAY.
d) we are 95% confident that people sampled drink between 1 and 3 glases
of water.
e) we are 95% confident that water is deadly for one out of 3 people
sampled.
2.When would you use a t-test instead of a z-tsest?
a)when we have a random sample
b)when we use a confidence level above 90%
c)WHEN OUR SAMPLE IS SMALL
d)when our sample is large
e)we can use either test
f)if you saw the guy next to you used a t test
3.What should we use an f-test for?
a)TO CHECK IF THE SAMPLE VARIANCES ARE EQUAL
b)we should use it for small samples
c)we should use it for large samples
d)to find the sample variance
e)to find see if the samples are equal
f) to avoid getting Fs on tests
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