Chapter 7 - Section 7.2 - Mean and Standard Deviation of x - Exercises - Page 283: 7.8

$\bar{x}\ $ sample mean is an estimator which is approximately equal to the population mean. The estimator is unbiased if and only if the estimator is equal to the population mean. $\bar{x}\ $ is an unbiased estimator towards $\mu$.

$\bar{x}\ $ sample mean is an estimator which is approximately equal to the population mean. The estimator is unbiased if and only if the estimator is equal to the population mean. $\bar{x}\ $ is an unbiased estimator towards $\mu$.