What is the population standard deviation for the numbers: 75, 83, 96, 100, 121 and 125?	Options:
A) 18.2
B) 20
C) 25
D) 26
E) 28
1. Firstly find the mean:   Mean = (75 + 83 + 96 + 100 + 121 + 125) ÷ 6 = 600 ÷ 6 = 100   2. Next find the variance. To calculate the Variance, take each difference, square it, and then average the result:   (75 - 100)2 + (83 - 100)2 + (96 - 100)2 + (100 - 100)2 + (121 - 100)2 + (125 - 100)2   = (-25)2 + (-17)2 + (-4)2 + (0)2 + (21)2 + (25)2   = 625 + 289 + 16 + 0 + 441 + 625   = 1,996   So the Variance = 1,996 ÷ 6 = 332.66...   3. The Standard Deviation is just the square root of the Variance   = √(332.66...)   = 18.2 correct to 1 decimal places   18.2nswer is 18.2
<result>A</result>
What is the population standard deviation for the numbers: 75, 83, 96, 100, 121 and 125?