2. Fifteen successive heats of a steel alloy are tested for hardness. The resulting data are shown in Table
6E.21. Set up a control chart for the moving range
and a control chart for individual hardness measure-
ments. Is it reasonable to assume that hardness is
normally distributed?​

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

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step-by-step explanation:

play black ops 4 answer a

step-by-step explanation: