8Properties of Sample Statistics

8.1 Introduction

Several statistics have been presented in the previous chapters. The main ones are images, images, and the sample proportion, images. Recall that images is used to estimate the population mean images, images is used to estimate the population standard deviation images, and images is used to estimate the probability of success at the population level images. Also, contrary to a parameter, such as images, which is fixed, a statistic, such as , is random: we obtain different results whenever a different sample ...

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