Finding the Difference of Sample Means
As a member of the marketing team for a pasta manufacturer, you want to find out whether there’s any difference in the mean number of people who would buy the new macaroni product, L-Bow Roni, if it had a red box and if it had a blue box. In each session, you bring in 30 people to try L-Bow Roni and have them respond with whether they would buy this product over the competitor’s product. Suppose you conducted 45 sessions with the red box and 60 sessions with the blue box. This data sheet gives you the number of yes responses to the survey for each session. Note that the two samples are different sizes.

Part A
What are the mean values of people who would purchase the red box and the blue box, respectively? Use the spreadsheet’s Average function (look under AutoSum in the Function menu) to calculate the mean.

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Part B
What is the difference of the two sample means (blue − red)?

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