... natural to use the median and the interquartile range to- gether, so is it natural to use the mean and the standard deviation together.In the case of a symmetric random variable, the median and ... 4 ways to choose a ring for the left hand and, foreach such choice, there are three ways to choose a ring for the right hand.Hence, there are 4 ·3 = 12 ways to choose a ring for each hand. This ... σ2=√196.38, σ3=√19600.38, and so on. The populationstandard deviation tends toward infinity as the aberrant value tends towardinfinity.5.4 Exercises1. Refer to the random variable X defined in...