According to Forbes, there are currently 2,153 billionaires in the US. A professor studying wealth in the US claims that billionaires are, on average, 10 years older than millionaires in the US. To investigate this belief, he selects a random sample of 10 billionaires in the US and 10 millionaires in the US and records the ages of each of these individuals. Here are dotplots and summary statistics of the data. 71 J? S X o o o o o o o lo. +|||||||[> Billionaires 10 68.5 16.057 20 30 40 50 60 70 80 90 3 o o o o o o u 10 56.2 25.539 4|_|_|_|_|_|_|_|_> Millionaires 20 30 40 so so 70 so 90 Age (years)