When using Student's t to compute an interval estimate,
A) we assume that the samples are collected from normally distributed populations
B) we estimate the population standard deviation based on the sample standard deviation
C) we use the z distribution
D) A and B only

Question

Quizplus · Accepted Answer

When using Student's t to compute an interval estimate, we assume that the samples are collected from normally distributed populations (A), and we estimate the population standard deviation based on the sample standard deviation (B). Therefore, choice D is the correct answer. We do not use the z distribution (C) when using Student's t, as t distribution is more appropriate when the sample size is small or the population variance is unknown.

When Using Student's T to Compute an Interval Estimate