SOLUTION: A retailer believes that the proportion of items returned after purchase is less at location A than all other locations. The other locations have a 14% return rate. Write the null

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Question 395266: A retailer believes that the proportion of items returned after purchase is less at location A than all other locations. The other locations have a 14% return rate. Write the null and alternative hypothesis for this problem. Would you use a z test or a t-test)?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A retailer believes that the proportion of items returned after purchase is less at location A than all other locations. The other locations have a 14% return rate. Write the null and alternative hypothesis for this problem. Would you use a z test or a t-test)?
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Ho: pA-pB = 0
Ha: pA-pB < 0
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I would use a z-test because it is a
test of difference of proportions.
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Cheers,
Stan H.