At times we wish to examine statistical evidence, and determine whether it supports or contradicts a claim that has been made (or that we might wish to make) concerning the entire population. This is ...
Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
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Null Hypothesis vs. Hypothesis: What’s the Difference?
Null hypothesis vs. hypothesis, which is the right choice? When you get into the different methods of analyzing data, there ...
If the P value is less than 5%, reject the null hypothesis; if the P value is .05 or more, don't reject the null hypothesis. Statistics textbooks -- and statisticians for that matter -- focus almost ...
If the data falls in the critical region, statisticians reject the null hypothesis in favor of the alternative. A one-tailed test in statistics is used to determine if a sample mean is significantly ...
Did you ever wonder why 19th century pirates are often represented wearing eye patches? I never did, because I assumed that it was for the obvious reason: they had lost an eye. Pirates, like many ...
Jacob Cohen (1923 - 1998) was a pioneer of psychological statistics. He taught us about effect sizes, power analysis, and multivariate regression, among many other things. I have always admired his ...
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