<PRE><B>Question 133480</B>
Mean = add all numbers together and divide by the number of values;
34+24+35+33+29+47+55=257/7=36.72=37
S.D.= each number minus the mean squared;
34-37={{{-3^2}}}=9
24-37={{{-13^2}}}=169
35-37={{{-2^2}}}=4
33-37={{{-4^2}}}=16
29-37={{{-8^2}}}=64
47-37={{{10^2}}}=100
55-37={{{18^2}}}=324
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add them all together = 686=S.D.
:)</PRE>