Question

research company desires to know the mean consumption of milk per week among males over age 4545. A sample of 18421842 males over age 4545 was drawn and the mean milk consumption was 4.94.9 liters. Assume that the population standard deviation is known to be 1.61.6 liters. Construct the 99%99% confidence interval for the mean consumption of milk among males over age 4545. Round your answers to one decimal place.

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Lower endpoint:       Upper endpoint:

Answer 1

99% confidence interval for is

- Z * / sqrt(n) < < + Z * / sqrt(n)

4.9 - 2.576 * 1.6 / sqrt(1842) < z < 4.9 + 2.576 * 1.6 / sqrt(1842)

4.8 < < 5.0

Lower endpoint = 4.8

Upper endpoint = 5.0