The    is that at least one of the population means is different from another (in other words, there is an effect of at least one of the treatments).

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The US Department of Health and Human Services compiles statistics on the consumption of alcohol.
An investigator decides to look at the role of age in determining alcohol use. She requests data on the amount of drinking done by three different age groups: 16- to 20-year-olds, 21- to 25-year-olds, and ≥ 26-year-olds. The results come in, and a statistician conducts an analysis of variance.
The    is that there is no difference between the population means (in other words, there is no treatment effect).
 
The    is that at least one of the population means is different from another (in other words, there is an effect of at least one of the treatments).
 
Note: The term “treatment effect” is used even when there is not actually a treatment.
The age group is     .
 
The treatments (16- to 20-year-olds, 21- to 25-year-olds, and ≥ 26-year-olds) are     .
 
Which of the following might contribute to within-treatments variance? Check all that apply.
Systematic differences in drinking frequency by age group
 
Individual differences in the frequency of drinking
 
Individual differences in the number of drinks per drinking binge
 
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