The following information was obtained from bwo independent samples randomly selected from two normally distributed population with unknown but equal variances. Mean Standard deviation Sample size Sample 1 15.55 3.26 20 Sample 2 13.97 3.78 21 What is the point estimate of the population variance? OA. 13.144 Ов. 12.205 OC.3.527 OD.3.536

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