Okay, the question is....
You own a potatoe chip company and are tired of complaints that the bags of chips are not consistently filled with the 1.5 ounces claimes. You are deciding which new dispensing machine to buy. Machine A dispenses a mean of 1.47 oz qith a standard deviation of 0.4 . Machinge B dispenses a mean of 1.52 with a variance of .72. Assuming all other things remain equal, which machine is a better buy?
I've already got all the information for machine A, however, I do not know how to find the Z score for the Machine B with a variance given insteady of a standard deviation given. Thank you pleas help asap.
2006-10-03 17:51:55 · 3 answers · asked by Heather N 2 in Education & Reference ➔ Homework Help
Hi, in this case, the standard deviation for Machine B is .85 (square root of .72)
2006-10-03 18:00:31 · answer #1 · answered by Mahmoud MC 3 · 0⤊ 0⤋
The standard deviation formula is very simple: it is the square root of the variance. It is the most commonly used measure of spread.
now since you have the std dev you can go ahead and do the same as machine A
2006-10-04 01:05:52 · answer #2 · answered by nickless 2 · 0⤊ 0⤋
Variance = (Standard Deviation)²
Take the square root.
2006-10-04 00:56:50 · answer #3 · answered by lintile 2 · 0⤊ 0⤋