Statistics

The sum of all deviations from the arithmetic mean of the numerical sequence 4, 6, 51, 77, 90, 93, 95, 109, 113, 117 is:

Correct result:

x =  0

Solution:

Σx=755 xˉ=Σx/10=75.5  Δ1=75.5−4=71.5 Δ2=75.5−6=69.5 Δ3=75.5−51=24.5 Δ4=75.5−77=−1.5 Δ5=75.5−90=−14.5 Δ6=75.5−93=−17.5 Δ7=75.5−95=−19.5 Δ8=75.5−109=−33.5 Δ9=75.5−113=−37.5 Δ10=75.5−117=−41.5  x=ΣΔi=0

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