When reading medical papers, there is a number that appears almost without fail.That is the p-value.'Since p < 0.05, a statistically significant difference was recognized.'This is a familiar ...

When reading testimonials from those who have taken the Securities Analyst Level I exam, statistics is the subject most ...

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 ...

Research and statistical analysis help us understand how the world works, how effective medications and treatments are, what influences our health, the best approach for business practices, and much ...

Understanding type I and II errors, with examples from medical trials and voter rolls, and how information reduces them.

Researchers from Northwestern University, University of Pennsylvania, and University of Colorado published a new Journal of Marketing study that proposes abandoning null hypothesis significance ...

Objection: Natural variability is the null hypothesis; there must be compelling evidence of an anthropogenic CO2 warming effect before we take it seriously. Answer: The null hypothesis is a ...