1Find the standard deviation of the following set of numbers

1.Find the standard deviation of the following set of numbers (7, 9, 9, 9, 10, 11, 12, 12, 14, 14 ) ?

2.Find the standard deviation of the following set of numbers (1, 2, 3, 3, 3, 4, 5, 7, 8, 8) ?

3.Find the coefficient of variation of the following set of numbers (2, 4, 6, 1, 7, 1, 5, 9, 5, 2) ?

Solution

Q1.
standard deviation of the following set of numbers (7, 9, 9, 9, 10, 11, 12, 12, 14, 14 )
Mean = 10.7
Standard deviation = 2.312
Number = 10