The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats

Question

The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats are as follows. 152, 196, 144, 139, 166, 83, 186, 157, 140, 138; (a) Find the mean and standard deviation of the weights. (Round the answers to one decimal place.) x = s = (b) What percent of the data lies within one standard deviation of the mean? % (c) What percent of the data lies within two standard deviations of the mean? %

Answer 1

mean = = arithmetic average=

sum/10 = 1501/10 = 150.1

round to 150

might be a mistake(s) in calculating the sum. It gets tedious

or easily punch in a wrong key on the calculator

calulating s is even worse

s^2=variance = sum(x-mean)^2 divided by 10 if 10 is the entire population, which seems to be the case

s=sqr(s^2)

use z tables or a z calculator to find the percentages within 1 and 2 s from the mean