SOLUTION: Assume that a sample is used to estimate a population mean
μ
μ
. Find the 90% confidence interval for a sample of size 969 with a mean of 83.5 and a standard deviation of 1
Question 1198504: Assume that a sample is used to estimate a population mean
μ
μ
. Find the 90% confidence interval for a sample of size 969 with a mean of 83.5 and a standard deviation of 19.9. 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!
, = .840
83.5- .840 < < 83.4 + .840
82.66 < < 84.34
= CI z = value
90% z =1.645
92% z = 1.751
95% z = 1.96
98% z = 2.326
99% z = 2.576