Asked Sep 4, 2019

what is the sample variance and standard deviation of 21​,16​,3​,9​,11


Expert Answer

Step 1

The formula for sample variance and standard deviation is given by:


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1 v(x) n-1 Σ-3) 2 SD = V(X)

Step 2

The sample mean is 12 for the sample of 5 values...


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Variance VX) (21-12)+(16-12) +(3-12 (-12) +(1-12 } 5 1 1 -{81+16+819+1} 4 188 4 = 47


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