Question

A student wanted to determine whether the wait time in the drive-through at McDonald’s differed from that at Wendy’s. She used a random sample of 30 cars at McDonald’s and 27 cars at Wendy’s and obtained these results:
(a) Is the sampling method dependent or independent?
(b) Is there a difference in wait times at each restaurant’s drive-through? Use the α = 0.1 level of significance.
(c) Draw boxplots of each data set using the same scale. Does this visual evidence support the results obtained in part (b)?


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  • CreatedApril 28, 2015
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