Homework Answers
| Sample #1 | Sample #2 | difference , Di =sample1-sample2 | (Di - Dbar)² |
| 94 | 90 | 4.00 | 1.00 |
| 82 | 84 | -2.00 | 25.00 |
| 90 | 84 | 6.00 | 9.00 |
| 76 | 70 | 6.00 | 9.00 |
| 79 | 80 | -1.00 | 16.00 |
| 85 | 80 | 5.00 | 4.00 |
| sample 1 | sample 2 | Di | (Di - Dbar)² | |
| sum = | 506 | 488 | 18.000 | 64.000 |
sample size , n = 6
mean of sample 1, x̅1= 84.333
mean of sample 2, x̅2= 81.333
mean of difference , D̅ =ΣDi / n =
3.000
std dev of difference , Sd = √ [
(Di-Dbar)²/(n-1) = 3.6
...................
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