Question 1
Consider these fivex,ypairs.
Sample # | y | x |
1 | 1.1 | 1.0 |
2 | 2.3 | 2.5 |
3 | 1.2 | 3.5 |
4 | 3.4 | 4.5 |
5 | 2.2 | 2.2 |
The regression equation is
\(\style{font-family:Times New Roman;}{y\;=\;0.780\;+\;0.460\;x\text{ }}\)
What is\(\style{font-family:Times New Roman;}{E_3}\)?
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1.19
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2.39
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–2.39
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–1.19
Question 2
Factors A and B show a correlation of 0.95. This means that:
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B causes A.
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A causes B.
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either A causes B or B causes A.
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nothing; correlation does not mean the factors are actually linked.