When s is used to estimate σ, the margin of error is computed by using
A) normal distribution
B) t distribution
C) the mean of the sample
D) the mean of the population

Question

Quizplus · Accepted Answer

When s is used to estimate σ, the margin of error is computed using the t distribution. This is because the population standard deviation (σ) is not known, and so the sample standard deviation (s) must be used instead. When using s to estimate σ, we use the t distribution to account for the variability of the sample standard deviation.

When S Is Used to Estimate σ, the Margin of Error