Use the Following to Answer Questions

question 28

Short Answer

Use the following to answer questions :
The marketing manager for a software company is trying to decide whether to market her company's newest product by mail,on television,or through the Internet.She selects 20 communities in which to test-market the product,advertising through one of the three media in each community.The following table shows the amount of sales,in hundreds of dollars,for each community:
Sales are normally distributed and the standard deviations are equal for all three methods of advertising.You are to test the hypothesis that the means are the same for all three treatments using the ANOVA method.
-What is the variance within samples,rounded to four decimal places?

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Definitions:

Self-Report

A method in which individuals provide subjective information about their own thoughts, feelings, or behaviors, typically through questionnaires or interviews.

Experimental Study

A research method involving the manipulation of variables to determine cause-and-effect relationships within a controlled environment.

Control Group

The group in an experiment that is treated as much as possible like the experimental group except that it does not participate in the experimental manipulation.

Correlation Study

A research method used to determine the relationship between two or more variables without implying causation.