Hard· Variance and standard deviation· +4 / −1
The number of values of such that the variance of is a natural number is :
The mean and variance of 15 observations are 8 and 3 respectively. One observation was wrongly taken as 5 in place of 20 . Find the…
JEE Mains 2022, June 28 - Shift 1 · Medium
Let the mean and the variance of 5 observations x_1,x_2,x_3,x_4,x_5 be 245 and 19425 respectively. If the mean and variance of the first 4…
JEE Mains 2022 June 29 Shift 1 · Easy