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=(8μ)2+(8μ)2+(3μ)2+(13μ)2+(4μ)2+(8μ)2+(10μ)2+(8μ)2=(81)2+(81)2+(31)2+(131)2+(41)2+(81)2+(101)2+(81)2=542  v=n11 e=811 542=77.4286

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