3) [2pts] A group of four friends were discussing the interquartile range, IQR. Raj thinks, "It gives the spread of the middle 50% of the data" Howard thinks "It is a measure of center." Leonard thinks "It is the difference of the maximum and minimum values." Sheldon says, "It's the typical distance of a data value from the mean." Who is correct? For two-points extra credit name the show these characters are from