Q. Select the outlier in the data set.6,56,62,66,67,68,69,79,89
Arrange Data Set: Arrange the data set in ascending order.Data set in order: 6,56,62,66,67,68,69,79,89.
Calculate IQR: Calculate the interquartile range (IQR).First, find the median (Q2) of the entire data set. The median is 67.Lower half (before 67): 6,56,62,66.Upper half (after 67): 68,69,79,89.Median of lower half (Q1): (62+66)/2=64.Median of upper half (Q3): (69+79)/2=74.670.