PSYCHOLOGY 5
FINAL EXAM
RAY GRIMM, Ph.D.
SHOW YOUR WORK and STATCRUNCH TABLES
Name: ________________________________________
7. SHOW YOUR WORK OR ATTACH STATCRUNCH TABLE
10. SHOW YOUR WORK
15. SHOW YOUR WORK
SCENARIO TWO: ATTACH STATCRUNCH TABLE HERE:
SCENARIO THREE: ATTACH STATCRUNCH TABLE HERE:
28. SHOW YOUR WORK
30. ATTACH STATCRUNCH TABLE HERE:
SCENARIO FOUR: ATTACH STATCRUNCH TABLE HERE:
SCENARIO FIVE: ATTACH STATCRUNCH TABLE HERE - [INCLUDE SUMMARY TABLE, ANOVA TABLE AND TUKEY HSD COMPARISON TABLES.]
36. SHOW YOUR WORK
40. SHOW YOUR WORK
44. SHOW YOUR WORK
SCENARIO SEVEN: ATTACH STATCRUNCH TABLE AND CORRESPONDING GRAPH HERE:
Microsoft Word - Final Exam SP2021.docx
Psy 5
Dr. Ray Grimm
Spring XXXXXXXXXXFinal Exam
Name _____________
Copy written exam and complete. Once you have completed the exam, enter your answers on Canvas by going to
the sidebar and click on "Quiz", then scroll down and click on Final Exam. Enter your answers. For "Show your
work and attach or draw your StatCrunch Summary Tables", a
ange them into a SINGLE PDF and attach them to
an email (either via Canvas or send to XXXXXXXXXX) and send it to Dr. Grimm. Even if you got the co
ect
answer on the quiz, but do NOT submit your work or table to me, you will NOT receive credit for the question.
Good luck, although I am sure you will not need it!
For questions 1 - 3, Identify the scale of measurement used to measure each of the following variables.
1. You ask teachers how many students they have in their math classes.
A. Nominal (N),
B. Ordinal (O),
C. Interval/Ratio(I/R).
2. You record the kind of vegetable that people think is most healthy to eat.
A. Nominal (N),
B. Ordinal (O),
C. Interval/Ratio(I/R).
3. You record the economic status of households (e.g., over 20K in debt, between 20K and 10K in debt,
etween 10K and 0K in debt, or not in debt).
A. Nominal (N),
B. Ordinal (O),
C. Interval/Ratio(I/R).
4. “Based on a sample of 52 classrooms, our institution is using 12% less electricity than one year ago” is an
example of what type of statement?
A. experimental
B. co
elational
C. inferential
D. descriptive
5. What is the shape of the following distribution?
A. Negatively skewed distribution
B. Positively skewed distribution
C. Bimodal distribution
D. Normal distribution
6. An experimenter wants to investigate the ability to concentrate under different conditions of crowding.
Concentration will be measured as the amount of time it takes a participant to complete a word puzzle. What
is the dependent variable, independent variable and alternative hypothesis?
A. Dependent variable is crowding; Independent variable is time; Ha: As people are put in crowded
environments, they will have a difficult time concentrating.
B. Dependent variable is time; Independent variable is crowding; Ha: As people are put in crowded
environments, they will have an easier time concentrating.
C. Dependent variable is time; Independent variable is crowding; Ha: Crowded environments will have an
effect on people’s ability to concentrate.
D. Dependent variable is crowding; Independent variable is time; Ha: Crowded environments will have an
effect on people’s ability to concentrate.
7. In the following data set, ___ is the mode, ___ is the median, and ___ is the mean. Show your work or
exactly draw your StatCrunch table.
XXXXXXXXXX, 7, 2, 4, 4, 8, 2, 4, 6, 5, 7, 3, 9, 4, 5, 4, 7
A. 5, 4, 5.24
B. 4, 6, 5.24
C. 4, 5, 5.24
D. 5, 5, 5.24
8. Five students took a personality test. Their deviation scores were –4, +3, +1, –2, +2. Assuming that these
scores form a normal distribution, a
ange the deviations so their order represents their ranking in terms of
frequency, from highest to lowest?
A. -4, +3, -2 and +2, +1
B. -2 and +2, +3, -4, +1
C. -2 and +2, -4, +3, +1
D. +1, +2 and -2, +3, -4
9. Laura took a standardized test and received a z score of -1.2. What percentage of the class did she do better
than?
A. .8849
B. .1151
C. .3859
D. .5000
10. Yolonda has an IQ of 132. The mean score for this IQ test is 100 with a standard deviation of 16. What was
her z-score on the exam? Show your work
A. 2.00
B. -2.00
C. 1.50
D. -1.50
11. The center of the distribution of sample means would be equal to:
A. the mean of the population
B. the mean of the sample
C. the standard deviation of the population
D. the standard deviation of the sample
E. the average distance of all sample means from the population mean
Scenario 1 (questions XXXXXXXXXX): A group of students are testing a new software program to improve reading. The
mean of their sample was M = 54 for a sample of 20 people. They know the population mean is 50 with a population
standard deviation equal to 10. They use an ? = .05 and a one-tailed test to determine if their sample is greater
than the known population mean.
12. What are the one-tailed null and research hypotheses for this study?
A. H0: µ = 50, H1: µ ≠ 50
B. H0: µ < 50, H1: µ > 50
C. H0: µ < 50, H1: µ > 50
D. H0: µ < 54, H1: µ > 54
E. H0: µ = 54, H1: µ >54
13. What sample mean should you expect if the null hypothesis is true?
A. 0
B. 1
C. 50
D. 54
14. What is the z-score that defines the critical region for this study? Use α = .05, one-tailed.
A. .5199
B. .4801
C. 1.65
D. 1.96
15. Compute the obtained z for this sample mean. Show your work.
A. -1.91
B. 1.74
C. 2.28
D. 1.79
16. Should you reject or fail to reject the null hypothesis?
A. Reject the null hypothesis
B. fail to reject the null hypothesis
17. Which of the following statements best summarize the results of this study?
A. People who used the new software program to improve reading, had different reading levels than the
general population.
B. People who used the new software program to improve reading, improved their reading levels beyond
the reading level of the general population.
C. People who used the new software program to improve reading, displayed reading levels below the
eading level of the general population.
D. People who used the new software program to improve reading, displayed no difference than the
eading level of the general population.
18. Which of the following statements describes a Type I e
or in the context of this study?
A. concluding that people who used the software program improved their reading level when in fact they
did not improve their reading level.
B. concluding that people who used the software program did not improve their reading level when in fact
they did not improve their reading level.
C. concluding that people who used the software program improved their reading level when in fact they
did improve their reading level.
D. concluding that people who used the software program did not improve their reading level when in fact
they did improve their reading level.
19. Which of the following accurately describes the critical region?
A. Samples means that are possible, but not likely if the null hypothesis is true
B. Samples means that are impossible if the null hypothesis is true
C. Samples means that are possible, but not likely if the null hypothesis is false
D. Samples means that are impossible if the null hypothesis is false
Scenario 2 (questions XXXXXXXXXX): Dr. Simon is implementing a new motivational program at ComStatNet. To
determine if the program is effective, she utilizes past data on product completion in an 8-hour day. The known past
population mean for product completion is ? = 28. Use the following dataset and StatCrunch to compute the t-
statistic. Use a one-tailed test, and ? = . ??. Attach or exactly draw your StatCrunch table.
XXXXXXXXXX XXXXXXXXXX
XXXXXXXXXX XXXXXXXXXX
20. State symbolically your null and research hypotheses.
A. H0: ? > 28; ?!: ? ≤ 28
B. H0: ? ≤ 28; ?!: ? > 28
C. H0: ? ≥ 28; ?!: ? < 28
D. H0: ? = 28; ?!: ? ≠ 28
21. Which of the following would be the best one-sentence summary of these results in APA style?
A. The product output of those who experienced the new motivational program is significantly different
from the past product completion levels, t (13) = -4.48, p