Gracey8416 Gracey8416

12-07-2024
Mathematics

Answered

Given the data below, what is the average of the difference scores?

Pretest: 80, 75, 92, 56, 69
Posttest: 89, 81, 94, 50, 78

a. 4
b. 80.6
c. 74.4
d. 78.4

Answer :

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