3. Are males or females more likely to return their shopping cart? Shoppers were observed at...

3. Are males or females more likely to return their shopping cart? Shoppers were observed at 7 different Walmarts at 9 different times. Of the 138 females that were observed, 121 returned their shopping cart. Of the 96 males that were observed, 76 returned their shopping cart. Is there evidence of a difference in the proportions of males and females who return their shopping cart at Walmart?

a. Define the parameter(s) and state the hypotheses.

b. What would be a good graph to display the data from this study?

c. Are the conditions for the appropriate analysis met? Explain and show work or attach a graph if appropriate.

Compute the appropriate test statistic.

Find the p-value.

Based on your p-value, what do you conclude? Use  = 0.05. (2 points) g. Construct a 99% confidence interval for the difference in proportions of males and females who return their shop

Solutions

Expert Solution

(a)

True difference in proportions of male and female who return their shopping cart at Walmart.

(b)

Bar graoh because data is categorical.

(c)

Yes because number of successes and failures are greater than 5 in both samples and both samples are independent to each other. Sample size are also large.

(d)

(e)

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orchestra answered 1 year ago

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