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Calculate the sample variance of the following sample data set: 92, 78, 42, 69, 51. Report your answer to one decimal place. if i use

Calculate the sample variance of the following sample data set: 92, 78, 42, 69, 51. Report your answer to one decimal place.

if i use excel i get 407 but the number is too big so i wish to confirm mannually with the formula but I forgot the exaplanation for manual calculation

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