Read about reporters who blew it when trying to write about stats. A mathematician leads you through the tricks, citing contemporary examples. I'm trying to run a test-retest on some data to show relaibility. There are other ways depending on the nature of your data, problem, and what assumptions you are willing to make about the population of interest.
Any statistical procedure has to be checked for validity and reliability.
This involves the data, how the data was collected, what assumptions you are willing to make about the data collection process and about the population of interest from which the data is presumably a random or probabilistic sample. All rights reserved.