find critical value for the test statistic A hypothesis will

find critical value for the test statistic

A hypothesis will be used to test that a population mean equals 10 against the alternative that the population mean is less than 10 with known variance sigma . What is the critical value for the test statistic Z0 for the significance level of 0.020? Round your answer to two decimal places (e.g. 98.76).

Solution

It is a left-tailed test.

Given a=0.02, the critical value is Z(0.02) =-2.05 (from standard normal table)