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View Resource Statistics at Square One: Exact Probability Test

This section of an online textbook discusses calculating the exact probability using observed sets of frequencies, constructing frequency tables, and computing p-values. Exercises and answers are...

http://bmj.bmjjournals.com/collections/statsbk/9.shtml
View Resource Statistics at Square One: Survival Analysis

Survival analysis is concerned with studying the time between entry to a study and a subsequent event. This site looks at the Kaplan-Meier survival curve, its method and how to calculate it. It...

http://bmj.bmjjournals.com/collections/statsbk/12.shtml
View Resource Statistics at Square One: Correlation and Regression

This section of an online textbook discusses the correlation coefficient and illustrated it visually through graphs. It explains calculations as well as how scatter plots can describe data. It...

http://bmj.bmjjournals.com/collections/statsbk/11.shtml
View Resource Statistics at Square One: Rank Score Tests

This site is part of an online textbook and discusses non-parametric tests. It explains the calculations, assumptions, and uses of the Wilcoxon ranked sum test. How to treat unpaired and paired...

http://bmj.bmjjournals.com/collections/statsbk/10.shtml
View Resource Statistics at Square One: Mean and Standard Deviation

This site discusses the standard deviation of grouped and ungrouped data, data transformation, and the standard deviation between and within subjects. Exercises are provided as well as the answers.

http://bmj.bmjjournals.com/collections/statsbk/2.shtml
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