When created effectively, this process ensures the success of an organizationâs marketing strategy. When you focus on the implementation phase of the process, which is the putting of the marketing strategies and plans into action, there are ways to help make this step as successful as possible.
For example, we use the sample mean as an unbiased estimator for the population mean. (Mathematically, it can be shown that the expected value of the sample mean is equal to the population mean). In the case of estimating the population standard deviation, the sample standard deviation is an unbiased estimator too.
which is an unbiased estimator of the variance of the mean in terms of the observed sample variance and known quantities. Note that, if the autocorrelations are identically zero, this expression reduces to the well-known result for the variance of the mean for independent data.