Find the variance of the data 6,5,9,13,12,8 and 10.

Find the standard deviation of first 10 natural numbers

Find the mean, variance and standard deviation of the following data: 62, 65, 57, 56, 69, 51, 62, 60

Find the mean, variance and standard deviation of the following data: 15, 22, 27, 14, 9, 9, 11, 21

Let a,b,c,d and e be the observations with mean m and standard deviation S.Then , find the standard deviation of the observations a+k,d+k,c+k,d+k,e+k.

Find the mean deviation from the mean for the following data 6.5,5,5.25,5.5,4.75,4.5,6.25,7.75,8.5

Find the mean deviation about the median for the data 34,66,30,38,44,50,40,60,42,51.

Find the variance and standard deviation for the following distribution using shortcut method.

Calculate the mean deviation about the mean of the set of first n natural numbers when n is an even number.

Find the mean deviation about the median for the following data.

Find the mean and standard deviation of the following frequency distribution

Find the mean deviation about the mean for the following data.

Find the mean deviation about the mean for the data

Find the mean and variance for each of the data : 

The sum and sum of squares corresponding to length x (in cm) and weight y (in gm) of 50 plant products are given below:
\(\sum _{ i=1 }^{ 50 }{ { x }_{ i } } =212,\sum _{ i=1 }^{ 50 }{ { x }_{ i }^{ 2 } } =902.8,\sum _{ i=1 }^{ 50 }{ { y }_{ i } } =261,\) \(\sum _{ i=1 }^{ 50 }{ { y }_{ i }^{ 2 }=1457.6 } \) 
which is more varying, the length or weight?