Question: A local school reports that the average grade point average (GPA) in the entire school is a mean score of 2.66, with a standard deviation

A local school reports that the average grade point average (GPA) in the entire school is a mean score of 2.66, with a standard deviation of 0.40. The school announces that it will be introducing a new program designed to improve GPA scores at the school. What is the effect size

(d) for this program if it is expected to improve GPA by:

1. 0.05 points?

2. 0.10 points?

3. 0.40 points?

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