Download Chapter 7

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

History of statistics wikipedia, lookup

Student's t-test wikipedia, lookup

Taylor's law wikipedia, lookup

Bootstrapping (statistics) wikipedia, lookup

Misuse of statistics wikipedia, lookup

Transcript
Sample Mean
1. For all populations, the sample mean x is an unbiased
estimator of the population mean , meaning that the
distribution of sample means tends to center about
the value of the population mean .
2. For many populations, the distribution of sample
means x tends to be more consistent (with less
variation) than the distributions of other sample
statistics.
Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.
7.1 - 57