
Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Last updated at May 29, 2023 by Teachoo
Ex15.2, 7 Find the mean and variance for the following frequency distribution. ( )^2 = 68280 N = = 30 Variance (" " ^2) = 1/ ( )^2 = 1/30 68280 = 2276