To go from the equation in the previous problem to the equation for t we must
A) substitute sample means for population means.
B) substitute sample variances for population variances.
C) substitute sample standard deviations for population variances.
D) draw very large samples.

Question

Quizplus · Accepted Answer

To calculate the t-statistic, sample variances are used in place of population variances because population parameters are typically unknown.

To Go from the Equation in the Previous Problem to the Equation