Question

A marketing research company desires to know the mean consumption of milk per week among people over age 45. A sample of 306 people over age 45 was drawn and the mean milk consumption was 3.9 liters. Assume that the population standard deviation is known to be 0.7 liters. Construct the 98% confidence interval for the mean consumption of milk among people over age 45. Round your answers to one decimal place. lowewrendpoint------upper endpoint------

Answer 1

Answer:-

Given That:-

A marketing research company desires to know the mean consumption of milk per week among people over age 45. A sample of 306 people over age 45 was drawn and the mean milk consumption was 3.9 liters. Assume that the population standard deviation is known to be 0.7 liters. Construct the 98% confidence interval for the mean consumption of milk among people over age 45.

Sample size = n = 306

Margin of error = E =

Margin of error = E = 0.1

At 98% confidence interval estimate of the population mean is,

(3.8 , 4.0)

Lower endpoint = 3.8

Upper endpoint = 4.0