Question

Find the Standard Deviation for the following data. Also find coefficient of variation 4,5,7,7,7,8,8,8,9​

Answer 1

Answer:

first standard deviations

formula sd=✓€(X - x-)

x-= €x÷ n

X = 4+5+7+7+7+8+8+8+9 = 63

63 ÷ 9 = 7

X X - X- ( X - x- )2

4. -3 9

5. -2. 4

7. 0. 0

7. 0. 0

7. 0. 0

8. 1. 1

8. 1. 1

8. 1. 1

9. 2. 4

______

20

apply in formula

√ 20 ÷ 9 = 0.496