I can not find this solution in my textbook

1pts) The following walks through the process of calculating the standard deviation. See page 71-72 of the textbook for more details. I1 214,132 2 21,33 218,34 :18 lemme: eviation of rst entry from mean = 1:1 T = eviation of second entry from mean = 1132 T eviation of third entry from mean = 1:3 T eviation of fourth entry from mean = $124 T 16 average of the deviations squared(variance) = 1e r.m.s size of the deviations or the standard deviation =