Monthly Archives: October 2014

Standard Deviation

Standard deviation The standard deviation tells us how spread out the data is from the mean. It is the square root of the variance. Standard Deviation and Variance Mathfun site describes the SD and variance in very simplest way with the example of height of 5 dogs. Robert Niles Robert Niles explains the concept… Read More »

Kappa test

Kappa test Understanding Interobserver Agreement:The Kappa Statistic Anthony J. Viera, MD; Joanne M. Garrett, PhD Kappa test or Cohen’s kappa is used to measure the inter-observer agreement on categorical scales, such as clinical assessment findings of patients. In this article, the authors describes an interpretation of this  test as well as its limitation. Limitations of kappa… Read More »