A useful theorem in statistics, *The Central Limit Theorem, states that sums and averages tend to follow a normal distribution, no matter what distribution the individual data values come from. For a ...

When and why do you use lognormal distribution or normal distribution for analyzing securities? Lognormal for stocks, normal for portfolio returns.

The empirical rule describes how points are clustered in a normally-distributed data set. It states that 95% of data fall within two standard deviations of the mean.

In medical research, is getting normal data really the norm? Andrew J. Vickers, PhD, discusses his theories of nonnormality in the statistical world.

You can use the CDFPLOT statement to fit any of six theoretical distributions (beta, exponential, gamma, lognormal, normal, and Weibull) and superimpose them on the cdf plot. The following statements ...

Easily computed estimates of the mean and variance of a Normal distribution obtained from samples which are truncated or censored are described. The estimates require only a single auxiliary function ...

Directed graph (or digraph) data arise in many fields, especially in contemporary research on structures of social relationships. We describe an exponential family of distributions that can be used ...

The frequency distribution is shown in a column chart. Note, you can choose a line chart, bar graph or XY Scatter chart, if those suit your data presentation better.