Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500 . The sample mean is 120, and the sample standard deviation is determined to be 36
a. Estimate the standard error of the mean.
b. Develop an approximate 95% confidence interval for the population mean.
c. Estimate the population total.
d. Develop an approximate 95% confidence interval for the population total.
a. 3.7 (rounded)
b. 112.68 to 127.32
c. 60,000
d. 56,338.3 to 63,661.7
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