Calculate the statistical power of the hypothesis test you carried in part awhen you tested whether aspirin
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Question:
Calculate the statistical power of the hypothesis test you carried in part a—when you tested whether aspirin had different rate of strokes compared to the placebo group.
To compute the power, assume the true relative risk of developing a stroke while taking a daily aspirin compared to placebo is 3.0 (which is approximately the observed effect size). Assume the baseline proportion of strokes in this population is 2/10,000.
________________
Use the following SAS program shell - but you will need fill in the blanks-
proc power;
twosamplefreq test=pchi
alpha=_____________
sides=_____________
relativerisk = _____________
refproportion = _____________
ntotal = 22071
power = .;
run;
- a. Interpret the power you calculated using SAS and comment what it might imply about your findings.
Related Book For
Introductory Statistics Exploring the World Through Data
ISBN: 978-0321978271
2nd edition
Authors: Robert Gould, Colleen Ryan
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