A major grocery store chain is trying to cut down on waste. Currently, they get

ID: 3392395 • Letter: A

Question

A major grocery store chain is trying to cut down on waste. Currently, they get peaches from two different distributors, WholeFruits and GreenGrocer. Out of two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. She then makes a confidence interval. Is there a significant difference in the quality of the peaches between the two distributors?
95% CI for pW-pG:(-0.156, -0.064)

We are 95% confident that the proportion of non sell-able peaches from Whole Fruits is anywhere between 0.064 and 0.156.

Explanation / Answer

As pW - pG is negative, then it must be that pG is greater than pW (OR, pW is lower than pG).

Hence, it is

OPTION D: We are 95% confident that the proportion of non sell-able items for Whole Fruits is anywhere between 0.064 and 0.156 LOWER than the proportion of non sell-able items for Green Grocer. [ANSWER, D]

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A major grocery store chain is trying to cut down on waste. Currently, they get

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