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Question
The value of product moment correlation coefficient between x and x is ______
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Solution
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For bivariate data. `bar x = 53, bar y = 28, "b"_"YX" = - 1.2, "b"_"XY" = - 0.3` Find estimate of X for Y = 25.
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∑(xi - 70) = - 35, ∑(yi - 60) = - 7,
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| Sales | Adv. Exp. | |
| Mean | 40 | 6 |
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| X | Y | |
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Choose the correct alternative:
If byx < 0 and bxy < 0, then r is ______
Choose the correct alternative:
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Demand (Y) |
|
| Mean | 85 | 90 |
| Variance | 25 | 36 |
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