Biderman's Psychology 2010 F15 H08 4 pt. Name ______________________________________
Fill out the hypothesis testing answer sheet for each problem. You don’t have to answer the question
on the answer sheet concerning confidence intervals.
1. A survey was taken in which respondents were asked if they thought the president was doing a
good job. In the population, is opinion evenly divided on the issue?
Yes:
42
No:
58
2. A job information survey was given to attendants in a mental hospital. The survey included the
question, "Are you satisfied in your present job?" It was used to create two groups - a “Satisfied”
group and an “Unsatisfied” group. These two groups represent two populations of employees - a
population of unsatisfied employees and a population of satisfied employees . After the survey was
administered, the employment records of the attendants were examine and those who had voluntarily
quit were noted. The results for 30 attendants are as follows: (S=Satisfied; U=Unsatisfied; W=Still
working; Q=Quit):
Hint: You'll have to form the two-way table of frequencies in this problem.
Hint: In this problem Satisfaction group is the independent variable and Whether quit is the
dependent variable.
Person
Satisfaction
Group
Whether
Quit
Person
Satisfaction
Group
Whether
Quit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S
S
S
S
S
S
U
U
U
U
U
S
S
S
S
W
Q
W
W
W
Q
Q
Q
Q
Q
W
Q
Q
W
Q
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
U
U
S
U
U
U
U
U
S
S
U
U
U
S
S
Q
W
W
W
Q
Q
Q
Q
W
W
Q
W
W
W
W
3. What determines whether you’ll use an independent groups t-test or a two-way chi-square test?
4. What is the significance level recommended for chi-square tests?
5. Comparing means between two groups requires which test?
Written HA (X2)- 1
Corty Hypothesis Testing Answer sheet. Name ________________________________________
H08 Problem 1
1-1. Give the name of the test statistic that will be employed to test the null hypothesis.
1-2. Do the data meet the assumptions of the test? Provide evidence.
1-3. The null and alternative hypotheses.
Null Hypothesis:________________________________________________________________
Alternative
Hypothesis:__________________________________________________________________
1-4. What significance level will you use to separate "likely" value from "unlikely" values of the
test statistic?
Significance Level = ___________________________________________________________
1-5. What is the value of the test statistic computed from your data and the p-value?
Test statistic value = _________________________
1-6. What is your conclusion?
p-value = _____________________
Do you reject or not reject the null hypothesis?
7. What are the upper and lower limits of a 95% confidence interval appropriate for the problem?
If a Confidence interval is not appropriate for this problem, say so.
Lower Limit = _________________________
Upper Limit = _______________________
1-8. State the implications of your conclusion for the problem you were asked to solve. That is,
relate your statistical conclusion to the problem.
Written HA (X2)- 2
Corty Hypothesis Testing Answer sheet. Name ________________________________________
H08 Problem 2
2-1. Give the name of the test statistic that will be employed to test the null hypothesis.
2-2. Do the data meet the assumptions of the test? Provide evidence.
2-3. The null and alternative hypotheses.
Null Hypothesis:________________________________________________________________
Alternative
Hypothesis:__________________________________________________________________
2-4. What significance level will you use to separate "likely" value from "unlikely" values of the
test statistic?
Significance Level = ___________________________________________________________
2-5. What is the value of the test statistic computed from your data and the p-value?
Test statistic value = _________________________
2-6. What is your conclusion?
p-value = _____________________
Do you reject or not reject the null hypothesis?
7. What are the upper and lower limits of a 95% confidence interval appropriate for the problem?
If a Confidence interval is not appropriate for this problem, say so.
Lower Limit = _________________________
Upper Limit = _______________________
2-8. State the implications of your conclusion for the problem you were asked to solve. That is,
relate your statistical conclusion to the problem.
3._______________________________________________________________________________
4._______________________________________________________________________________
5._______________________________________________________________________________
Written HA (X2)- 3