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Calculate the average mass
2.66
Calculate the deviation of penny 1 from the average mass
-0.16
Calculate the deviation of penny 2 from the average mass
0.040
Calculate the deviation of penny 3 from the average mass
0.14
Calculate the deviation of penny 4 from the average mass
-0.06
Calculate the deviation of penny 5 from the average mass
0.04
Calculate the deviation squared for penny 1
0.026
Calculate the deviation squared for penny 2
0.002
Calculate the deviation squared for penny 3
0.02
Calculate the deviation squared for penny 4
0.004
Calculate the deviation squared for penny 5
0.002
Calculate the sum of all the deviations squared
0.052
Calculate standard deviation
0.114