Tools for Social Work

Using Standardization and the Normal Curve to Enhance your Social Work Practice, Education & Research

Posts Tagged ‘P Value’

Sample, Population and P Value Discussion

Posted by nepeht on November 22, 2008

http://www.graphpad.com/articles/pvalue.htm.

A discussion of the meanings of P Value, Sample and Population.

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P Value

Posted by nepeht on November 22, 2008

http://en.wikipedia.org/wiki/P-value.

In statistical hypothesis testing, the p-value is the probability of obtaining a result at least as extreme as the one that was actually observed, given that the null hypothesis is true. The fact that p-values are based on this assumption is crucial to their correct interpretation.

More technically, a p-value of an experiment is a random variable defined over the sample space of the experiment such that its distribution under the null hypothesis is uniform on the interval [0,1]. Many p-values can be defined for the same experiment.

 From Wikipedia.

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P-Value Calculator by GraphPad Sofware

Posted by nepeht on November 21, 2008

http://www.graphpad.com/quickcalcs/pvalue1.cfm.

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