
MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Please let me know if I calculated the number of participants required for the crossover trial study. It is #3 of my homework. Thank you.

Transcribed Image Text:n-335
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3. A crossover trial is planned to evaluate the impact of an educational intervention program to
reduce alcohol consumption in patients determined to be at risk for alcohol problems. The pla
is to measure alcohol consumption (the number of drinks on a typical drinking day) before the
intervention and then again after participants complete the educational intervention program
How many articipantswouldberequiredtoen urethata95%,confidencen terval for the mean-
difference in the number of drinks is within 2 drinks of the true mean difference? Assume that
the standard deviation of the difference in the mean number of drinks is 6.7 drinks.
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