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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. When the price of a divided by the price of the preceding year, we, get:

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

Q. A time series consists of:

Q. If two variables, x and y, have a very strong linear relationship, then:

Q. In a moderately skewed distribution, the value of mode is 120 and that of median is 140. Find the value of arithmetic mean.

Q. The measurements of spread or scatter of the individual values around the central point is called:

Q. Relationship between correlation coefficient and coefficient of determination is that

Q. For the recorded observation, the ratios measured by absolute variation are considered as

Q. Index number calculated by Fisher's formula is ideal because it satisfy: