the owner of a pool cleaning business wants to know how much time on the average his workers spend cleaning a for last week 7 employees each worth a six-hour shift in all they cleaned 42. Which is the most appropriate unit in which to calculate an answer to his question

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

the first one, all those points on the line just make a strait line.

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b