The ages in years of a group of 18 adults have the following statistics, x= 745 x² = 3951 • Calculate the mean age Standard deviation of the of the ages One adults correct to 2 decimal places. person leaves the group and the of the remaining 17 is 4years. mean age Find the, age of the person who left. Standard deviation of the remaining 17 adults. Correct to 2 decimal places.
