In testing the difference between the means of two normally distributed populations using independent random samples with known variances,the appropriate test statistic is based on the _____ distribution.
A)z
B)t
C)F
D)chi-square
E)exponential

Question

Quizplus · Accepted Answer

The appropriate test statistic for testing the difference between the means of two normally distributed populations using independent random samples with known variances is based on the z distribution. This is because the z-test is used when the population variances are known and the sample size is large.

In Testing the Difference Between the Means of Two Normally