PSY 315 Week 5 Assignment: Hypothesis Testing, Statistical Analysis, and Correlation
A week 5 assignment in PSY 315 focusing on hypothesis testing, statistical analysis, and correlation.
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PSY 315 Week 5 Assignment: Hypothesis Testing, Statistical Analysis, and
Correlation
Practice Problems Ch.7, 8, 9, 11
Martha Rodriguez
PSY 315 Week 5
February 25, 2013
Instructor: Gina Pendergrass
Ch. 7 Problem #15:
In a particular country, it is known that college seniors report falling in love an average of 2.20 times
during their college years. A sample of five seniors, originally from that country but who have spent their
entire college career in the United States, were asked how many times they had fallen in love during
their college years. Their numbers were 2, 3, 5, 5, and 2. Using the .05 significance level, do students like
these who go to college in the United States fall in love more often than those from their country who
go to college in their own country? (a) Use the steps of hypothesis testing. (b) Sketch the distributions
involved. (c) Explain your answer to someone who is familiar with the Z test (from Chapter 5) but is
unfamiliar with the t test for a single sample.
(a) Hypothesis Testing Steps
1. Hypothesis Setup:
o Null Hypothesis (H₀): μ = 2.20 (Students in the U.S. fall in love the same number
of times as those in their home country)
o Alternative Hypothesis (H₁): μ > 2.20 (Students in the U.S. fall in love more
often than those in their home country)
2. Test Statistic:
We use the t-test for a single sample:
where:
Correlation
Practice Problems Ch.7, 8, 9, 11
Martha Rodriguez
PSY 315 Week 5
February 25, 2013
Instructor: Gina Pendergrass
Ch. 7 Problem #15:
In a particular country, it is known that college seniors report falling in love an average of 2.20 times
during their college years. A sample of five seniors, originally from that country but who have spent their
entire college career in the United States, were asked how many times they had fallen in love during
their college years. Their numbers were 2, 3, 5, 5, and 2. Using the .05 significance level, do students like
these who go to college in the United States fall in love more often than those from their country who
go to college in their own country? (a) Use the steps of hypothesis testing. (b) Sketch the distributions
involved. (c) Explain your answer to someone who is familiar with the Z test (from Chapter 5) but is
unfamiliar with the t test for a single sample.
(a) Hypothesis Testing Steps
1. Hypothesis Setup:
o Null Hypothesis (H₀): μ = 2.20 (Students in the U.S. fall in love the same number
of times as those in their home country)
o Alternative Hypothesis (H₁): μ > 2.20 (Students in the U.S. fall in love more
often than those in their home country)
2. Test Statistic:
We use the t-test for a single sample:
where:
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Document Details
University
Southern New Hampshire University
Subject
Psychology