To estimate the average annual expenses of students on books and class materials a sample of size 100 is taken. The average is $250 and the standard deviation is $40. A 99% confidence interval for the population mean is
A) $243.42 to $256.58.
B) $230 to $270.
C) $147.20 to $352.80.
D) $239.72 to $260.28
RES / 341 RES/341 RES341 RES 341 QUIZ # 3
(Chapters 2+8 from Applied Statistics in Business and Economics )
To View all the Questions covered : 4 sets of RES341 Final
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