Question

(CO 1) What is the standard deviation and its meaning given this population of customer ages? 45, 76, 30, 22, 51, 40, 63, 66, 41

16.5 which means that many of the ages will be around this value

17.5 which means that many of the ages will be around the square of this value

16.5 which means that many of the ages will be within this value of the average age

17.5 which means that many of the ages will be within this value of the average age

Answer 1

Sample mean $\bar{x}$ = $\sum$ X / n

= 434 / 9

= 48.2222

Standard deviation = sqrt [ $\sum$ X² - n $\bar{x}$² / n-1 ]

= sqrt [ 23392 - 9 *43.78² / 8 ]

S = 17.5

17.5 Which means that meany of the ages will be within this value of the average age.