A sample set of weights in pounds are 1.01,.95,1.03,1.04,.97,.97,.99,1.01,and 1.03.Assume the population of weights are normally distributed.Find a 99 percent confidence interval for the mean population weight.
A)[.965 1.035]
B)[.969 1.031]
C)[.973 1.027]
D)[.941 1.059]

Question

Quizplus · Accepted Answer

The correct answer is A because the 99% confidence interval for the mean population weight is [.965, 1.035]. This interval was calculated using the formula:CI = x̄ ± z * (s / √n)where x̄ is the sample mean, s is the sample standard deviation, n is the sample size, and z is the z-score corresponding to the desired confidence level. In this case, x̄ = 1.00, s = 0.029, n = 9, and z = 2.576.

A Sample Set of Weights in Pounds Are 1