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)The t statistic is used for large samples only.

Question

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)​The t statistic is used for large samples only.

Quizplus · Accepted Answer

The t statistic uses the sample variance to estimate the population variance because the population variance is unknown. This is a key difference from the z-score, which uses the known population variance.

Which of the Following Is a Fundamental Difference Between the T