A sample variance

Calculate the value of the sample variance. −8,−8,−3,13,4,−8,10,8

Correct answer:

v =  77.4286

Step-by-step explanation:

−8,−8,−3,13,4,−8,10,8  n=8 Σ=−8+(−8)+(−3)+13+4+(−8)+10+8=8  μ=nΣ​=88​=1  e=(−8−μ)2+(−8−μ)2+(−3−μ)2+(13−μ)2+(4−μ)2+(−8−μ)2+(10−μ)2+(8−μ)2=(−8−1)2+(−8−1)2+(−3−1)2+(13−1)2+(4−1)2+(−8−1)2+(10−1)2+(8−1)2=542  v=n−11​⋅ e=8−11​⋅ 542=77.4286

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