The difference between creating a Z score from a single score and creating one from a sample mean is that:
A)you use the mean and standard deviation from the distribution of means
B)the estimated population variance is used directly
C)the difference score is divided by the sample's standard deviation
D)only the population's mean is used

Question

Quizplus · Accepted Answer

When creating a Z score from a sample mean, you use the mean and standard deviation from the distribution of means (also known as the standard error of the mean) rather than the individual data points' standard deviation. This accounts for the variability between sample means.

The Difference Between Creating a Z Score from a Single