Find the standard deviation of the following group of numbers (use n – 1 instead of...

Question

Question

Find the standard deviation of the following group of numbers (use n – 1 instead of n)…2, 5, 8, 9

6

3.14

2.74

3.16

math Statistics-And-Probability

Answer 1

Answer #1

Solution :

n = 4

$\bar x$ = $\sum x / n$ = (2 + 5 + 8 + 9) / 4 = 24 / 4 = 6

s = $\sqrt$ $\sum$ (x - $\bar x$ )² / n - 1

= $\sqrt$ [ (2 - 6)² +(5 - 6) ² + (8 - 6)² + (9 - 6)² / 4 - 1 ]

= 3.16

Answer 2

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