please answer the whole question
x | 8.2 | 9.2 | 10.2 | 8.0 | 8.3 | 8.7 |
y | 9.9 | 18.2 | 21.0 | 10.2 | 11.4 | 13.1 |
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Σx = | |
Σy = | |
Σx^{2} = | |
Σy^{2} = | |
Σxy = | |
r = |
x | = | |
y | = | |
= | + x |
r^{2} = | |
explained | % |
unexplained | % |
Hi, since the problem posted by you contains multiple sub-parts, we are answering the first three subparts. If you need any specific sub-part to be answered, please submit that particular sub-pat or specify the subpart number in the message box.
Part (a):
The scatter diagram displaying the data is as follows:
Part (b):
Using calculator, the following preliminary calculations verified.
∑x = (8.2 + 9.2 + 10.2 + 8 + 8.3 + 8.7) = 52.6.
∑x2 = (8.2 2 + 9.22 + 10.22 + 82 + 8.32 + 8.72) = 464.5.
∑y = (9.9 + 18.2 + 21 + 10.2 + 11.4 + 13.1) = 83.8.
∑y2 = (9.92 + 18.2 2 + 212 + 10.22 + 11.42 + 13.12) = 1,275.86.
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