If the lower and upper confidence limits of the population mean μ,using a sample of size 100,are 225 and 280,respectively,then the lower and upper confidence limits of the total of a population of size 3000 are respectively
A)652,500 and 812,000
B)675,000 and 840,000
C)697,500 and 868,000
D)652,862 and 812,452

Question

Quizplus · Accepted Answer

To find the confidence limits for the total of a population, multiply the sample mean's confidence limits by the population size. The mean's confidence interval is from 225 to 280. For a population of 3000, multiply these limits by 3000 to get the total's confidence interval: 225*3000 = 675,000 and 280*3000 = 840,000.

If the Lower and Upper Confidence Limits of the Population