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Q. Value of b in the trend line Y = a + bX is:

Q. ___is particularly suitable for the construction of index nos.

Q. ………….is a point of reference in comparing various data describing individual behaviour.

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

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

Q. The arithmetic mean is 12 and the number of observations are 20 then the sum of all the values is

Q. One of the following methods of calculating mode is:

Q. Which of the following can’t be a component for a time series plot?

Q. In the class intervals 40 – 50, 50 – 60, the number 50 is included in which of the following?

Q. If the coefficient of determination is equal to 1, then the correlation coefficient :