SOLUTION: 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, and 29.4 Calculate the standard deviation of the time it took for the 8 participants to solve the puzzle.

Question 1181811: 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, and 29.4
Calculate the standard deviation of the time it took for the 8
participants to solve the puzzle.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Mean is 20.8125
sd for a sample is to take the difference of each value from the mean, square it, add them all up and divide by 7. Then take the square root of the value. For a population, divide by 8 and then take the square root.
sd for sample is 4.07; for a population 3.81. The asker probably wants the first value.
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