100 high school students take part in an experiment to reduce alcohol use. 50 st
ID: 3135292 • Letter: 1
Question
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
The experimetal procedure follows the conditions:
Independent group assumption: Randomizing the experiment gives independent groups.
Independence assumption: The subjects are assigned randomly to treatment groups.
Randomization condition: Theexperiment is randomized.
The appropriate test would be 2 sample t test, to measure the that mean number of drinks consumed by students in experimental groups is less than mean number of drinks consumed by control group.
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