A hypothesis will be used to test that a population mean equ

A hypothesis will be used to test that a population mean equals 5 against the alternative that the population mean is less than 5 with known variance Zo = Zo for the significance level of 0.015? Round your answer to two decimal places (e.g. 98.76). sigma What is the critical value for the test statistic

Solution

It is a left-tailed test.

Given a=0.015, the critical value is Z(0.015) =-2.17 (from standard normal table)