A researcher measures the mean time (in seconds)it takes two groups of children to complete an activity task.She finds that Group A (M = 22 seconds)completed the task more quickly than Group B (M = 36 seconds).She then computes a weighted mean for both groups combined and calculates = 26.Based on the information provided,which group had a larger sample size?
A)Group A
B)Group B
C)The sample size is equal in both groups.
D)It is not possible to know this without knowing the sample size for each group.

Question

Quizplus · Accepted Answer

The weighted mean is closer to Group A's mean, indicating that Group A had a larger sample size.

A Researcher Measures the Mean Time (In Seconds)it Takes Two