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Question
byx is the ______ of regression line of y on x
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Solution
slope
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For bivariate data. `bar x = 53, bar y = 28, "b"_"YX" = - 1.2, "b"_"XY" = - 0.3` Find estimate of Y for X = 50.
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| X | Y | |
| Mean | 13 | 17 |
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| 6 | 9 | 54 | 36 | 81 |
| 2 | 11 | 22 | 4 | 121 |
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byx = `square/square`
∴ Regression equation of x on y is `square`
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| x | y | |
| Mean | 53 | 142 |
| Variance | 130 | 165 |
`sum(x_i - barx)(y_i - bary)` = 1170
|bxy + byz| ≥ ______.
