A psychologist studied the alcohol consumption patterns of people in two age groups. One group consisted of people aged 21 to 35 , and the other consisted of people aged 36 to 50 . The psychologist interviewed random and independent samples from each group. She assigned a score from 0 to 100 to each individual (a score of 0 meant no alcohol consumption) according to factors such as the frequency and the amount of alcohol consumed. The results from the study are summarized below. \table[[Age 21 to
35,
n_(1)=21,
\bar{x} _(1)=50,
s_(1)^(2)=198.8