use variable chart

 

In this process the quality controller selects randomly group of boxes and make sure if the box confirms to the standards or not. The collected data is presented in the table below Number of Number of Baxes of Baxes confirms the Number of Number of Boxes confirms Number of Number of Boxes Boxes confirms Number Number Bexes Bexes of Boxes confirms the Sample Selected the Standards Sample Selected the Standards Sample Selected Standards Sample Selected 31 32 Standards 21 22 23 24 25 205 196 185 169 210 200 185 175 12 155 145 12 175 162 200 190 185 180 185 175 13 195 179 205 195 33 34 35 36 37 180 170 14 205 195 14 195 184 195 185 175 165 Is 195 185 15 185 169 195 180 175 165 205 190 26 27 28 29 195 16 174 205 195 195 185 17 195 185 17 175 159 205 195 185 180 190 180 18 180 166 205 195 38 39 40 175 165 195 185 19 195 179 210 195 190 180 10 205 195 20 185 169 30 210 200 180 170