Please workout complete problem. Thank you! 100 high school students take part i
ID: 3135554 • Letter: P
Question
Please workout complete problem. Thank you!
100 high school students take part in an experiment to reduce alcohol use. 50 students are placed in the control group, and 50 students are placed in the experimental group. The experimental group takes a one-week course about the dangers of alcohol abuse. Prior to taking the course, students are asked how many alcoholic drinks they consumed in the past week. One month after completing the course, the same students are again asked how many alcoholic drinks they consumed in the past week. You want to determine whether there was a reduction in the number of drinks consumed by the students in the experimental group. What type of test should you use?Explanation / Answer
This scenario measures the mean number of drinks consumed by students in experimental group(50), say muex and mean number of drinks consumed by students in control group (50), say muc after the course about dangers of alcohol. Finally you want to check whether there is reduction in experimental group.
To test for difference in means for independent groups, perform 2-sample t test to check the null hypothesis
H0:mu ex-muc=0 against H1:muex-muc<0
Assume that the Independent group asssumption, Independence assumption, Randomization condition and Nearly normal condition are reasonably met.