To test: The claim that texting while driving is independent of irregular seat belt usage.

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Chapter 11.2, Problem 8BSC

To determine

To test: The claim that texting while driving is independent of irregular seat belt usage.

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What were the average sales for the four weeks prior to the experiment? What were the sales during the four weeks when the stores used the digital display? What is the mean difference in sales between the experimental and regular POP time periods? State the null hypothesis being tested by the paired sample t-test. Do you reject or retain the null hypothesis? At a 95% significance level, was the difference significant? Explain why or why not using the results from the paired sample t-test. Should the manager of the retail chain install new digital displays in each store? Justify your answer.

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