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

Algebra ->  Probability-and-statistics -> 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       Log On


   

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) About Me  (Show Source):
You can put this solution on YOUR website!

ME+=+z%2Asigma%2Fsqrt%28n%29    = ME+=+1.645%2A16.3%2Fsqrt%281077%29 = .817
27.7- .817 < mu < 27.7 + .817
26.883 < mu < 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