Do the sample variances target the value of the population variance? in general, do sample variances make good estimators of population variances? why or why not? a. the sample variances do not target the population variance, therefore, sample variances do not make good estimators of population variances. b. the sample variances do not target the population variance, therefore, sample variances make good estimators of population variances. c. the sample variances target the population variances, therefore, sample variances make good estimators of population variances. d. the sample variances target the population variance, therefore, sample variances do not make good estimators of population variances.