What is the standard deviation (s) for this set of data? 24, 18, 21, 28
A) 4.27
B) 22.75
C) 18.25
D) 3.70

Question

Quizplus · Accepted Answer

To calculate the standard deviation, we first need to find the mean:

Mean = (24+18+21+28)/4 = 22.75

Next, we need to find the variance:

Variance = [(24-22.75)^2 + (18-22.75)^2 + (21-22.75)^2 + (28-22.75)^2]/4

Variance = 16.1875

Finally, we take the square root of the variance to get the standard deviation:

s = sqrt(16.1875) = 4.27

Therefore, the answer is A) 4.27.

What Is the Standard Deviation (S) for This Set of Data