What is measured by the denominator of the z-score test statistic?​Group of answer choices​The average distance between M and µ that would be expected if H0 was true​Whether or not there is a significant difference between M and µ​The actual distance between M and µ​The position of the sample mean relative to the critical region

The denominator of the z-score test statistic measures the average distance between M (sample mean) and µ (population mean) that would be expected if the null hypothesis (H0) was true. This is essentially the standard error of the mean. It provides a measure of how much the sample mean is expected to vary from the population mean under the null hypothesis.

The denominator of the z-score test statistic measures the average distance between M (the sample mean) and µ (the population mean) that would be expected if the null hypothesis (H0) was true. This is essentially the standard error of the mean. It provides a measure of how much the sample mean is expected to vary from the population mean under the null hypothesis.