The mean of first 10 whole numbers is:
4.5
5.5
6.5
The first 10 whole numbers are 0 to 9.
Sum of first n natural numbers = n(n+1)2
So, Sum of first 9 natural numbers = 9(10)2 = 45
Total number of observation = 10
Mean= 4510 = 4.5
Find the mean of the first 10 whole numbers.
Find the mean of the squares of the first seven whole numbers.