Question

, "Opening up" is thought to improve individuals' mood following a tragic incident. A health psychologist is interested in its effect on HIV positive patients. The psychologist collected a sample of 17 HIV positive patients and asked them to talk about their HIV related issues ("open up") with their family. The psychologist assessed the patients' level of hopefulness afterwards and obtained a mean of 114.58 with a standard deviation of 4.92. The average hopefulness of HIV positive individuals is known to be 111. What can be concluded with an α of 0.05?

a) What is the appropriate test statistic?
---Select---na, z-test, One-Sample t-test, Independent-Samples t-test, Related-Samples t-test

b)
Population:
---Select---HIV related issues, individuals' mood, family, HIV positive patients, HIV positive individuals
Sample:
---Select---HIV related issues, individuals' mood, family, HIV positive patients, HIV positive individuals

c) Obtain/compute the appropriate values to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value =_______ ; test statistic = _________
Decision: ---Select---Reject H0 or Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[ ______,_________ ]

e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
d =________ ; ---Select---na, trivial effect, small effect, medium effect, large effect
r² =_______ ; ---Select---na, trivial effect, small effect, medium effect, large effect

f) Make an interpretation based on the results.

HIV positive patients that "opened up" had a significantly better mood than HIV positive individuals.

HIV positive patients that "opened up" had a significantly worse mood than HIV positive individuals.

HIV positive patients that "opened up" did not have a significantly different mood than HIV positive individuals.

Answer 1