CitySearch

question 56

Multiple Choice

CitySearch.com reports that 55% of its users are in the 18-to-30 age demographic, 35% are in the 31-to-45 demographic, and the remaining 10% are in the 46-and-older demographic.In a recent survey of 200 randomly selected CitySearch.com users, most users were in the 18-to-30 age demographic, some were in the 31-to-45 demographic, and the rest were in the 46-and-older demographic You will conduct a proper chi-square test to determine whether this sample result is enough to reject a null hypothesis that the age group distribution of CitySearch.com users is as the website describes.The significance level is .05.If the chi-square statistic for the sample result turns out to be 6.434, what should you conclude?

• A)Don't reject the website's claim.
• B)Reject the website's claim.
• C)The website's claim is true.
• D)The website's claim can't be true.

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Definitions:

Sales

A measure of the total amount of goods and services sold by a company in a specific period.

Coefficient Of Determination

A statistical measure that explains how much the variance of one variable explains the variance of the second variable.

Dependent Variable

A variable in statistical modeling whose value is influenced or predicted by one or more other variables.

Independent Variable

A variable in an experiment or model that is manipulated to observe its effect on a dependent variable.