It is known that the population standard deviation of the IQ

It is known that the population standard deviation of the IQ test results is 16. Assuming that we have a random sample of 155 and a sample mean of 94, what would be your 90% confidence interval estimate of the population mean? (Hint: use 1.65 as the critical z-value)

[87.9, 100.1]

[89.9, 98.1]

[91.9, 96.1]

[93.9, 94.1]

Solution