Calculate Harmonic mean for the following series: (1) 10,20,25,40,50 (ii) X: 0-10 10-20 20-30 30-40 40-50 F: 8 15 20 4 3

There are three Groups A,B and C with no. of persons 50, X, 90. The mean and Standard deviations for these groups are 113, Y, 115 and 6, 7, Z respectively. The Combind n , mean and Standard deviation for three ...

The heights of persons with No. of persons is given , Heights (in Cm ): 58, 59, 60, 61, 62, 63, 64, 65 and No. of persons : 10, 18, 30, 42,35, 28, 16, 8 . Find Karl Pearson’s coefficient of correlation.

Fit a Binomial Distribution to the following frequency data : x: 0 1 3 4 f: 28 62 10 4