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 plan 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 participants would be required to ensure that a 95% confidence interval 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. Z= ________ s= ________ E = ________ n= ________I am trying to understand the breakdown of this question from my homework. The course hero tutorial says to cut and paste the question for assistance. HOw else am I supposed to pose the question to get help? This is the question I do not understand how to breakdown.
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