​Ten Years Ago,only 15% of the U

question 38

Multiple Choice

​Ten years ago,only 15% of the U.S.population consisted of people more than 65 years old.A researcher plans to use a sample of n = 300 people to determine whether the population distribution has changed during the past ten years.If a chi-square test is used to evaluate the data,what is the expected frequency for the older-than-65 category?

• A)​15
• B)​30
• C)​45
• D)​150

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Definitions:

One-Way ANOVA

A statistical test used to determine if there are any statistically significant differences between the means of three or more independent (unrelated) groups.

Simple Analysis

A straightforward examination or investigation into a subject or data set to derive basic insights or conclusions.

Two-Way ANOVA

A statistical test used to determine the effect of two nominal predictor variables on a continuous outcome variable.

Factorial Design

A research design used to explore more than one treatment variable.