May
24
Filed Under (Business) by admin on 24-05-2008

Need to work with binomial probability distributions? Don’t forget that Microsoft Excel supplies powerful tools for performing just this sort of statistical analysis.

A binomial distribution describes the outcome of a multi-step experiment, consisting of n identical trials, where each trial ends in either a success or a failure and the probability of a success p does not change from trial to trial. This useful statistical analysis can be performed relatively easily using Microsoft Excel using the Excel BINOMDIST, CRITBINOM and NEGBINOMDIST functions.



May
20
Filed Under (Business) by admin on 20-05-2008

Need to make Beta Probability calculations? Microsoft Excel supplies two useful statistical functions for making just these sorts of calculations, BETADIST and BETAINV.

Microsoft Excel supplies two useful statistical functions for making beta probability calculations, BETADIST and BETAINV. Perhaps surprisingly, neither function is difficult to use as long as understand the inputs that supply data to the function.

Understanding the beta probability density function, BETADIST

The BETADIST function returns the cumulative beta probability density function.

Statisticians often use the cumulative beta probability density function to study variation across samples, such as when comparing two groups of people performing the same task to see whether they have the same success rate.