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Hi Group,
Maybe you could help me with this:
An independent sample of 50 depressed patients completed the X and the Y
depression scale and a questionnaire comparing the acceptability of each
measure. More patients indicated that the X took less time to complete
(64.0% vs. 12.0%; 24% indicated no difference between the 2 measures), and
was less of a burden to complete (50.0% vs. 10.0%, 40% indicated no
difference). The
majority of patients indicated that the two scales were equally
understandable (56%), though twice as many indicated that the X was
easier to understand (30.0% vs. 14.0%). Nearly three times as many patients
indicated that they would prefer to complete the X at every visit in order
to monitor the outcome of treatment (40.0% vs. 14.0%).
The question is how do I statistically compare whether the differences
between the scales (e.g., 64% vs. 12%) are significant?
With a chi-square test for known distributions or a z-test or something
else?
Thanks in advance!
Iwona
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