Question
A school psychologist believes that a popular new hypnosis technique increases depression. The psychologist collects a...
A school psychologist believes that a popular new hypnosis
technique increases depression. The psychologist collects a sample
of 23 students and gives them the hypnosis once a week for two
months. Afterwards the students fill out a depression inventory in
which their average score was 49.21. Normal individuals in the
population have a depression inventory average of 49 with a
variance of 121.00. What can the psychologist conclude with an α of
0.01?
a) What is the appropriate test statistic?
z-test
Independent-Samples t-test
Related-Samples t-test
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 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
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