A study of 90 bolts of carpet showed that their average length was 180 yards. The standard deviation of the population is 10 yards. Which of the following is the 99% confidence interval for the mean length per
Bolt of carpet?
A) (177.55, 182.45)
B) (173.49, 186.51)
C) (176.74, 183.26)
D) (177.28, 182.72)

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The Answer of A study of 90 bolts of carpet showed that their average length was 180 yards. The standard deviation of the population is 10 yards. Which of the following is the 99% confidence interval for the mean length per
Bolt of carpet?
A) (177.55, 182.45)
B) (173.49, 186.51)
C) (176.74, 183.26)
D) (177.28, 182.72)

A Study of 90 Bolts of Carpet Showed That Their