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प्रश्न
Define Regression.
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उत्तर
The term ‘Regression’ was first coined and used in 1877 by Francis Galton while studying the relationship between the height of fathers and sons. The average height of children born of parents of a given height tended to move or “regress” toward the average height in the population as a whole. Gabon’s law of universal regression was confirmed by his friend Karl Pearson, who collected more than a thousand records of heights of members of family groups. The literal meaning of the word “regression” is “Stepping back towards the average”.
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संबंधित प्रश्न
Choose the correct alternative:
Regression analysis is the theory of
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bXY is _____
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‘r’ is __________.
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bXY .bYX is _________.
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bYX > 1 then bXY is _______
|bxy + byx | ≥ ______.
bxy and byx are _______.
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Corr (x, y) = _____
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Corr `("x - a"/"c", "y - b"/"d")` = - corr (x, y) if,
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Regression equation of Y on X is ____
The term regression was used by:
In the regression equation Y = β0 +β1 X, the X is called:
The term Uiin regression equation is a ______.
Mention the uses of Regression Analysis.
If Y = 2 - 0.2X, then the value of the Y-intercept is equal to ______.
Find the regression equation Y on X and X on Y for the following data:
| Y | 45 | 48 | 50 | 55 | 65 | 70 | 75 | 72 | 80 | 85 |
| X | 25 | 30 | 35 | 30 | 40 | 50 | 45 | 55 | 60 | 65 |
Regression mainly occurs when a person is experiencing______.
