A Machine Is Supposed to Fill Cans That Contain 12

Essay

A machine is supposed to fill cans that contain 12 oz. Each hour, a sample of four cans is tested; the results of 15 consecutive hours are given below. $\begin{array}{l|llll|l|l}S&&&A&&M&R\\\hline1 & 11.2 & 11.7 & 11.8 & 11 .7 & 11.6 & 0.6 \\2 & 11.8 & 11.3 & 11.6 & 11 .6 & 61.575 & 0.5 \\3 & 11.3 & 12.0 & 11.8 & 11.7 & 11.7 & 0.7 \\4 & 12.1 & 11.6 & 12.1 & 12 . 0& 11.95 & 0.5 \\5 & 11.8 & 11.8 & 11.9 & 11.9&11 .85 & 0.1\\6 & 12.0 & 11.9 & 11.8 & 11 .7& 11.85&0 .3 \\7 & 11.6 & 12.0 & 11.9 & 11.8 & 11.825&0 .4 \\8 & 11.5 & 12.1 & 11.9 & 12 .0& 11.875&0 .6 \\9 & 12.1 & 12.1 & 11.7 & 11.9&11 .95&0 .4\\10 & 11.7 & 12.0 & 11.6 & 11.9 & 11.8 & 0.4 \\11 & 12.1 & 12.4 & 11.9 & 12.2&12 .15 & 0.5 \\12 & 12.5 & 12.0 & 12.4 & 12.3 & 12.3 & 0.5\\13 & 12.5 & 12.0 & 12.1 & 12 .1& 12.175& 0.5 \\14 & 12.4 & 12.0 & 12.0 & 12.4 & 12.2 & 0.4 \\15 & 12.4 & 12.4 & 12.6 & 12 & 12.375 & 0.5\\\end{array}$