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

Q. A period for which index number is determined is called as ------

Q. In a bivariate sample, the sum of squares of differences between marks of observed values of two variables is 33 and the rank correlation between them is 0.8. Find the number of pairs of observations:

Q. While computing a weighted index, the current period quantities are used in the:

Q. The sum of the squares of the deviations of the variable is when taken about arithmetic mean

Q. From which average, the sum of deviations is zero?

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. Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?

Q. If the regression line is Y on X, then the variable X is known as..........................

Q. Periodic movements with duration longer than a year are called