A professor wants to see the relationship between number of text massages a student sent and...
A professor wants to see the relationship between number of text massages a student sent and quiz performance. Testing (X) Quiz (Y) 0 8 4 8 6 7 2 8 0 9 The following have whole number answers. As such please write only the number and not any decimal. For example write "1" and not "1.0". If any answer is negative, put the negative sign in front of the answer. For example write "-1". What is ΣXY? What is ΣX? What is ΣY? What is SP? 1 points QUESTION 13 6e) SSx? 1 points QUESTION 14 6f) SSy? 1 points QUESTION 15 6g) r?
Homework Answers
| S.No | X | Y | (x-x̅)2 | (y-y̅)2 | (x-x̅)(y-y̅) |
| 1 | 0 | 8 | 5.7600 | 0.00 | 0.0000 |
| 2 | 4 | 8 | 2.5600 | 0.00 | 0.0000 |
| 3 | 6 | 7 | 12.9600 | 1.00 | -3.6000 |
| 4 | 2 | 8 | 0.1600 | 0.00 | 0.0000 |
| 5 | 0 | 9 | 5.7600 | 1.00 | -2.4000 |
| Total | 12 | 40 | 27.2000 | 2.00 | -6.0000 |
| Mean | 2.400 | 8.00 | SSX | SSY | SXY |
ΣXY =90
ΣX=12
ΣY =40
SP =-6
6e) SSx =27.20 ~ 27
6f) SSy =2
6g)
| correlation coefficient r= | Sxy/(√Sxx*Syy) = | -0.813 ~ -1 | |
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{
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