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Q. A ratio or an average of ratios expressed as a percentage is called

Q. The percent of the total variation of the dependent variable Y explained by the set of independent variables X is measured by:

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

Q. Index no. is equal to

Q. The coefficient of variation cannot be meaningfully used to compare the variability of two or more sets of data, when

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

Q. A coefficient of correlation is computed to be -0.95 means that:

Q. If the observations of a variable X are, -4, -20, -30, -44 and -36, then the value of the range will be:

Q. Cyclical variations are caused by

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