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Sangeeta Singh, a 1986 batch Indian Revenue Service (IRS) officer has been given additional charge of Chairman, Central Board of Direct Taxes (CBDT), after incumbent JB Mohapatra retired as the head of the direct taxes administration body on April 30, 2022.
If xi | fi , i = 1,2,...n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equal to:
Second differencing in time series can help to eliminate which trend?
(I) Quadratic trend
(II) Linear trend
The purchasing power of money is equal to:
For making frequency distribution, the number of classes used depends upon:
If the difference between the rank of the 4 observations are 2.5, 0.5, -1.5, -1.5, then Spearman's rank correlation coefficient equals to:
Which option is WRONG?
For the random variable X with probability density function f(x) = (x−3)2 /5; x = 3, 4, 5, the variance of X is:
For a group of 100 students, the mean and standard deviation of scores were found to be 30 and 5 respectively. Later on it was discovered that the scor...
The problem of statistics is given in two sections of same standard. The odds against for section X to solve the problem are 4:3 and odds in favor to s...
