Given are five observations for two variables, x and y.
|
xi |
1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
|
yi |
3 | 8 | 4 | 10 | 15 |
(a)
Develop a scatter diagram for these data.
Homework Answers
(a)
The scatterplot is: OPTION 4
Most closely resembles the one constructed using excel:
(b)
(c)
OPTION 2
(d)
(e)
When x =2 we get:
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y.
xi
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12
6
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14
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45
55
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values of b0 and b1 using b1 =
Σ(xi − x)(yi − y)
Σ(xi − x)2
and b0 = y − b1x.
ŷ =
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of y when x = 9.
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