Determine the value of the sample correlation coefficient when (a) ???????????????????? = 9100, ???????????????????? = 7200, and

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Determine the value of the sample correlation coefficient when

(a) ???????????????????? = 9100, ???????????????????? = 7200, and ˆ????1 = −7.2.

(b) ???????????????????? = 15200, ???????????? = 4100, and ˆ????1 = 14.3.

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