Question: Simple random sampling was used to obtain a sample of n = 80 elements from a population of N = 400. The sample mean was

Simple random sampling was used to obtain a sample of n = 80 elements from a population of N = 400. The sample mean was = 75, and the sample standard deviation was found to be s = 8.

a. Estimate the population total.

b. Estimate the standard error of the population total.

c. Develop an approximate 95% confidence interval for the population total.

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