Mathematics, 01.04.2021 19:10, cpcoolestkid4

Using the same cure it is known that a standard deviation is 130 kg/cm² and we may assume normal distribution. 100 pieces of cement have been tested and the
observed sample mean is X = 4970. Find the 95% confidence interval for the
mean.
(A) (4858.37, 5081.63)
(C) (4883.33, 5056.67)
(B) (4885.07, 5054.93)
(D) (4944.00, 4996.00)

Answers: 1

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Using the same cure it is known that a standard deviation is 130 kg/cm² and we may assume normal di...