SOLUTION: Assume that a sample is used to estimate a population mean
μ
μ
. Find the 90% confidence interval for a sample of size 1077 with a mean of 27.7 and a standard deviation of
Question 1198503: Assume that a sample is used to estimate a population mean
μ
μ
. Find the 90% confidence interval for a sample of size 1077 with a mean of 27.7 and a standard deviation of 16.3. Enter your answer as a tri-linear inequality accurate to 3 decimal places. Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
= = .817
27.7- .817 < < 27.7 + .817
26.883 < < 28.517
= CI z = value
90% z =1.645
92% z = 1.751
95% z = 1.96
98% z = 2.326
99% z = 2.576