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a-normal-population-has-s2-6-the-sum-of-squares-of-deviations-of-15-sample-values-from-their-mean-being-120

A normal population has s²=6. The sum of squares of deviations of 15 sample values from their mean being 120, what is the x2 (chi-square) value ?

[A] 9

[B] 48

[C] 20

[D] 1.33

Answer & Explanation
Answer: 20