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 s) completed the task more quickly than Group B (M = 36 s). She then computes a weighted mean for both groups combined and calculates a weighted mean equal to 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.


Ans: A

Education

You might also like to view...

A child in your classroom breaks out with chicken pox on May 5th. As a responsible teacher, you would alert the other children's families to observe their child closely for symptoms during which time period?

a. May 16 to 23 b. May 12 to 19 c. May 8 to 15 d. May 23 to 30

Education

When disagreements between families and schools arise regarding a student's qualification for any special education service, the following is first offered to resolve differences:

a. An impartial hearing officer b. A due process meeting c. Mediation services d. All of the above

Education

Identify any three preparations teachers may make before successful conferences

What will be an ideal response?

Education

It is important for teachers to have knowledge of the community in planning. Knowledge of the community includes all of the following EXCEPT

A. Physical environment B. Cultures C. Ability to speak community members' languages D. Values

Education