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प्रश्न
The correlation coefficient
पर्याय
r = `± sqrt("b"_"xy" xx "b"_"yx")`
r = `1/("b"_"xy" xx "b"_"yx")`
r = bxy × byx
r = `± sqrt(1/("b"_"xy" xx "b"_"yx")`
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उत्तर
r = `± sqrt("b"_"xy" xx "b"_"yx")`
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संबंधित प्रश्न
Find the coefficient of correlation for the following:
| Cost (₹) | 14 | 19 | 24 | 21 | 26 | 22 | 15 | 20 | 19 |
| Sales (₹) | 31 | 36 | 48 | 37 | 50 | 45 | 33 | 41 | 39 |
Example for positive correlation is
If the values of two variables move in the opposite direction then the correlation is said to be
Correlation co-efficient lies between
The correlation coefficient from the following data N = 25, ∑X = 125, ∑Y = 100, ∑X2 = 650, ∑Y2 = 436, ∑XY = 520
The variable whose value is influenced (or) is to be predicted is called
If two variables moves in decreasing direction then the correlation is
Calculate the coefficient of correlation from the following data:
∑X = 50, ∑Y = – 30, ∑X2 = 290, ∑Y2 = 300, ∑XY = – 115, N = 10
Calculate the correlation coefficient from the data given below:
| X | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Y | 9 | 8 | 10 | 12 | 11 | 13 | 14 | 16 | 15 |
If the points on the scatter diagram indicate that as one variable increases the other variable tends to decrease the value of r will be:
