HSC Commerce: Marketing and Salesmanship इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Mathematics and Statistics

Choose the correct alternative.

Cov (x, y) = __________

Choose the correct alternative.

If bxy < 0 and byx < 0 then 'r' is __________

Choose the correct alternative.

If equations of regression lines are 3x + 2y − 26 = 0 and 6x + y − 31 = 0 then means of x and y are __________

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If b_xy < 0 and b_yx < 0 then ‘r’ is __________

Fill in the blank:

Regression equation of Y on X is_________

Fill in the blank:

There are __________ types of regression equations.

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Corr (x, −x) = __________

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If u = `"x - a"/"c" and  "v" = "y - b"/"d"` then b_xy = _______

Fill in the blank:

If u = `"x - a"/"c" and  "v" = "y - b"/"d"` then b_yx = _______

Fill in the blank :

The graph of time series clearly shows _______of it is monotone.

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|b_xy + b_yx| ≥ ______

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If b_yx > 1 then b_xy is _______

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b_xy . b_yx = _______

Corr (x, x) = 1

Regression equation of X on Y is `("y" - bar "y") = "b"_"yx" ("x" - bar "x")`

State whether the following statement is True or False.

Regression equation of Y on X is `("y" - bar "y") = "b"_"yx" ("x" - bar "x")`

State whether the following statement is True or False.

Corr (x, y) = Corr (y, x)

State whether the following statement is True or False.

b_xy and b_yx are independent of change of origin and scale. 

‘r’ is regression coefficient of Y on X

State whether the following statement is True or False.

b_yx is correlation coefficient between X and Y