問題詳情
17. A study was commissioned to compare the housing costs of two growing cities.The goal of the study was to estimate the difference in the average housingcosts (as measured in price per square foot) of the two cities. Two pilot sampleswere taken and yielded the following information:
Use this information to determine how large the sample sizes must be in orderto estimate the true difference in the average housing costs of the two cities towithin $1.25. Assume that equal sample sizes are desired and a 95% reliabilitylevel is essential.
(A)nl =n2 =76
(B) n1 =n2=84
(C)n1 =n2=119
(D)n1 =n2= 25
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增