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

question 79

Multiple Choice

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.

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