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# Psyc 354 Homework 6 Solution

• Date Submitted: 07/30/2016 05:36 AM
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PSYC 354   Homework 6 Solution

PSYC 354
HOMEWORK 6
Percentiles and Hypothesis Testing with Z-Tests
When submitting this file, be sure the filename includes your full name, course and section.
Example: HW6_JohnDoe_354B01
Be sure you have reviewed this module/week’s lesson and presentations along with the practice
data analysis before proceeding to the homework exercises. Complete all analyses in SPSS, then
questions (such as the text-based questions or the APA Participants section) in the appropriate
place within the same file.
Part I: Concepts
Questions 1–4
These questions are based on the Nolan and Heinzen reading and
end-of-chapter questions.
Part I: Questions 1-7
End-of-chapter problems:
If applicable, remember to show work in your homework document for partial credit.
1) What are the 6 steps of hypothesis testing?
(State the 6 steps)
A)
B)
C)
D)
E)
F)
2) Using the z table in Appendix B, calculate the following percentages for a z score of
-0.45
2-a) % above this z
2-b) % below this z
Work:
Work:
Page 1 of 7
PSYC 354
2-c) At least as extreme
as this z score (on either
side):
Work:
3) Rewrite each of the following percentages as probabilities, or p levels:
4) If the critical values, or cutoffs, for a two-tailed z test are -2.05 and +2.05, determine
whether you would reject or fail to reject the null hypothesis in each of the following
cases:
4a) z = 2.23
4b) z = -0.97
5)
Imagine a class of twenty-five 12-year-old girls with an average height of 62 inches.
We know that the population mean and standard deviation for this age group of
girls is m=59 inches, s = 1.5 inches. (Note that this is a z statistic problem.)
5a)...