the sample meanThe best point estimate for the population mean is the sample mean, x . The best point estimate for the population variance is the sample variance, 2 s .
"The variance of the sampling distribution of the median is greater than that of the sampling distribution of the mean. It follows that sample mean is likely to be closer to the population mean than the sample median. Therefore, the sample mean is a better point estimate of the population mean than the sample median."Mar 18, 2016
s2 (sample variance) is the best point estimate for population variance o2. s (sample standard deviation) is the best point estimate for the population standard deviation o.
Answers. The best estimation for the population mean is the sample mean—that is, 8.1 mmol/l.