04.05the mean shoe size of the students in a math class is 7.5.most of the shoe sizes fall within 1 standard deviation, orbetween a size 6 and a size 9.what is the standard deviation of the shoe size data for themath class? o 1.5o 27o 3.0o 3.8mark this and returnsave and exitnextஅபமார்

The formula of standard deviation is 

SD = square root of (variance)

Variance is the average of the squared differences from the Mean.

Variance = (6-7.5)^2 + (9-7.5)^2 / 2

Variance = 2.25

SD = square root (2.25)

SD = 1.5

The correct answer is A. 1.5

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i