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Q. Regression Coefficient of Y on X is:

Q. The mean weight of 150 students in a class is 60 Kg. The mean weight of Boy students is 70 Kg and that of a girl students is 55 kg. Find the number of Boys and Girls in the class.

Q. Which of the following is an absolute measure of dispersion?

Q. Find the median of the set = { 11,22,33,55,66,99 }

Q. Find the mode of the set (8, 5, 7, 10, 15, 21, 5, 7, 2, 5)

Q. Laspeyre's index = 110, Paasche's index = 108, then Fisher's Ideal index is equal to:

Q. The arithmetic mean of the marks obtained by 50 students was calculated as 44. It was later discovered that a score of 36 was misread as 56. Find the correct value of arithmetic mean of the marks obtained by the students.

Q. The component of time series useful for long term forecasting is

Q. The additive and multiplicative time series models are:

Q. If one of the regression coefficients is greater than unity, the other must be: