A school psychologist is interested in whether a particular remedial math training program helps improve students’ math skills. He randomly assigns 18 students to one of two groups: remedial training or no intervention. At the end of the training program, he administers a 100 point math test to all students, and counts the number of errors made by students in each group. These data (number of errors per student) are shown below. NO INTERVENTION REMEDIAL TRAINING 18 12 6 17 8 13 13 15 12 19 6 22 10 19 7 20 SS1 = 64.22222 11 SS2 = 60.22222 ∑X1 = 158 ∑X2 = 8 Calculate t
A school psychologist is interested in whether a particular remedial math training program helps improve students’ math skills. He randomly assigns 18 students to one of two groups: remedial training or no intervention. At the end of the training program, he administers a 100 point math test to all students, and counts the number of errors made by students in each group. These data (number of errors per student) are shown below.
NO INTERVENTION REMEDIAL TRAINING
18 12
- 6
17 8
13 13
15 12
19 6
22 10
19 7
20 SS1 = 64.22222 11 SS2 = 60.22222
∑X1 = 158 ∑X2 = 8
Calculate t
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