Range of data:`20,40,30,60,80,100,10,70` is:

The range of data 11, 40, 36, 10, 25, 30, 15, 14 is k. find k

Find the standard deviation for the following data: 10, 20, 30, 40, 50, 60, 70, 80, 90

The range of the data 30, 61, 55, 56, 60, 20, 26, 46, 28, 56 is

5, 10, 20, 40, 80, ?

Calculate median , quartiles , 6th decile and 70 th percentile from the following data : {:("Marks (less than)",80,70,60,50,40,30,20,10),("Number of Students",100,90,80,60,32,20,13,5):}

Using step deviation method find the standard deviation and its coeficient of the following data.Class 20-30,40-50,50-60,60-70,70-80,80-90 and Frequency 3,61,132,153,140,51,2

The range of the data 14, 15, 18, 25, 11, 40, 36, 30 is ______.