`3,4,9,11,13,6,8,10` find standard deviation

If the standard deviation of 1,2,3,4.......10 is sigma , then find the standard deviation of 11, 12,13,14,.....,20.

If the standard deviation of 0,1,2,3...9 is K, then the standard deviation of 10,11,12,13...19 is

If the variance of 1,2,3,4,5,...,10 is (99)/(12) , then standard deviation of 3,6,9,12,...,30 is

Find the variance and standard deviation for the following data, 6, 7, 10, 12, 13, 4, 8, 12.

Find the mean variance and standard deviation for the following data: 6,7,10,12,13,4,8,12