If the first quartile of data set 8,10,8,7,9 is 7.5, then the value of quartile deviation is
28 If r ₁₂ = +0.80, r13 = -0.40 and r23 = -0.56, then the square of multiple correlation coefficient (correct to four decimal places) R2...
The sample sizes for two cases were 15 each with means as 104 and 114 respectively and variances as 200 and 510 respectively.
Let the null hyp...
For the distribution with unknown θ

We set the tes...


For making frequency distribution, the number of classes used depends upon:

For the random variable X with probability density function f(x) = (x−3)2 /5; x = 3, 4, 5, the variance of X is:
