Math

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y.

x 7 7 5 5 7
y 95 90 75 85 95

(a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy).
Incorrect: Your answer is incorrect. . (SS(x)) (my answer was 100.9)
Incorrect: Your answer is incorrect. . (SS(y)) (my answer was 720)
Incorrect: Your answer is incorrect. . (SS(xy)) (My answer was 1396)
I have got several answers and none of them have been correct.
(b) Find r. (Give your answer correct to three decimal places.) (my answer was 7.04) and it was wrong, could some one work this out so I can see how I missed it.
Incorrect: Your answer is incorrect. .

asked by DeeDee
  1. What happen if you got a D on your finials but you have good grade in that class can you still pass

    posted by Sarra
  2. This does not explain how to come up with the right answer for me. I have worked it out several times and come up with the same answers, which I posted above. Can someone work this out so I can see what I have done wrong and can learn from my mistakes...

    posted by DeeDee
  3. shame

    posted by Anonymous
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