HSC Commerce (English Medium) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Mathematics and Statistics

Choose the correct alternative.

If u = `("x - a")/"c" and "v" = ("y - b")/"d"  "then"   "b"_"yx"` = _________

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If u = `("x - a")/"c" and "v" = ("y - b")/"d"  "then"   "b"_"xy"` = _________

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Corr (x, x) = _____

The following table shows the index of industrial production for the period from 1976 to 1985, using the year 1976 as the base year.

Fit a trend line to the above data by graphical method.

The regression equation of y on x is given by 3x + 2y − 26 = 0. Find b_yx. 

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The first step in time series analysis is to _______.

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Time-series analysis is based on the assumption that _______.

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b_yx = ______

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b_xy = ______

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Cov (x, y) = __________

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

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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 __________

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Regression equation of Y on X is_________

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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 = _______

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

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

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|b_xy + b_yx| ≥ ______