21 = X 23 = (b) Find the interquartile range (IQR) of the data set. IQR = X (c) Calculate a lower boundary using Q - 1.5 . IQR. Calculate an upper boundary using @ + 1.5 . IQR. (Note that 1.5 . IQR means 1.5 times the Lower boundary: X Upper boundary: (d) Any values less than the lower boundary or greater than the upper boundary are considered outliers. Identify all the outliers of the data set. If is more than one outlier, separate them with commas. If there are no outliers, click "None". Outliers: None X