A researcher measures the number of trials it takes two samples of participants to master a new task.In both samples,SS = 240.Sample A consisted of 12 participants and Sample B consisted of 18 participants.Which sample is associated with the largest variance?
A) Sample A
B) Sample B
C) Both samples have the same variance.
D) There is not enough information to answer this question.

Question

Quizplus · Accepted Answer

Variance is calculated as SS divided by the sample size minus 1. Sample A, with fewer participants, will have a larger variance because the same sum of squares (SS) is divided by a smaller number.

A Researcher Measures the Number of Trials It Takes Two