Although Their Formulas Are Similar, One Primary Difference Between a Z-Score

Multiple Choice

Although their formulas are similar, one primary difference between a z-score (z) and a t-statistic (t) is that the ______ of the formula for the t-statistic involves ______.

A) denominator; the variability of individual scores (Xs) , not the variability of sample means
B) numerator; difference between a score (X) and a population mean (μ)
C) denominator; the variability of sample means , not the variability of individual scores (Xs)
D) numerator; the difference between a score (X) and a sample mean