CCMH 525 Week 7 Individual Assignment Week Seven
Homework Exercise
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Answer the following questions, covering material from Ch. 13 of the Methods in Behavioral
Research tex
A researcher is studying the effects of yoga on depression. Participants are randomly assigned
to one of two groups: yoga and medication, which is the experimental group; or support group
and medication, which is the control group. What is the null hypothesis? What is the research
hypothesis? (2 points)
In the scenario described in the previous question, the researcher implements two programs
simultaneously: a 6-week yoga program coupled with medication management and a 6-week
support group program coupled with medication management. At the end of the 6 weeks,
participants complete a questionnaire measuring depression. The researcher compares the
mean score of the experimental group with the mean score of the control group. What
statistical test would be most appropriate for this purpose? Explain your response. (2 points)
In the scenario described in the previous questions, the researcher predicted that participants
in the experimental group—yoga plus medication—would score significantly lower on measures
of depression than would participants in the control group—support group plus medication.
True or false: A two-tailed test of significance is most appropriate in this case. Explain your
response. (1 point)
Explain the relationship between the alpha level, or significance level and Type 1 error. (2
points)