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Q. The coefficient of determination must be

Q. The mean deviation is minimum when deviations are taken from:

Q. The suitable average for averaging the shoe sizes for children is:

Q. A distribution consists of three components with total frequencies of 200, 250 and 300 having means 25, 10 and 15 respectively. Find the mean of the combined distribution.

Q. In constructing index number geometric mean relatives are:

Q. If each observation of the data is increased by 5, then what happens to its mean?

Q. The ratio of price of single commodity in a given period to its price in another period is called the

Q. In a moderately asymmetrical distribution, the value of mean is 75 and the value of mode is 60:

Q. If r = ± 1, the two regression lines are...............................

Q. The coefficient of correlation between the regression coefficients is: