Question: Compute the values of ????, ????2, ????, and the sample coefficient of variation when (a) ???? = 30, ???? = 655, and ????2 = 15,

Compute the values of ????̄, ????2, ????, and the sample coefficient of variation when

(a) ???? = 30, Σ???? = 655, and Σ????2 = 15, 101.35.

(b) ???? = 45, Σ???? = 1320, and Σ????2 = 39, 512.

(c) ???? = 125, Σ???? = 874.3, andΣ????2 = 6394.05.

(d) ???? = 200, Σ???? = 10, 913.8, and Σ????2 = 652, 347.28.

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