Which of the Following Is a Fundamental Difference Between the T

Multiple Choice

Which of the following is a fundamental difference between the t statistic and a z-score?

A) The t statistic uses the sample mean in place of the population mean.
B) The t statistic uses the sample variance in place of the population variance.
C) The t statistic computes the standard error by dividing the standard deviation by n - 1 instead of dividing by n.
D) All of these are differences between t and z.