A manufacturer of cell phone cases monitors the machines closely to make sure they are producing cases that do not vary far from the desired dimensions. One specific dimension of interest is the width of the case. The width of produced cases variesc) An outlier is any value that falls at least 1.5 times the interquartile range (IQR) above Q3 or below Q1. If the width of a case is an outlier, that case must be discarded. What proportion of all cases will be discarded?