This requests the default density estimate: a normal distribution using the sample estimates as parameter values. The density curve is superimposed on the histogram, as illustrated in Figure 12.15..

parameters for the normal curve. The normal parameters and are estimated by the sample mean ()and the sample standard deviation (). a chi-square goodness-of-fit test. Compared to the usual cutoff ...

A bell curve is a normal distribution. It gets its name from its bell shape, with the top of the curve or the highest point being the most probable event in a series of data.

A bell curve is a graph depicting the normal distribution, which has a shape reminiscent of a bell. The top of the curve shows the mean, mode, and median of the data collected.

Animator Shuyi Chiou and the folks at CreatureCast give an adorable introduction to the central limit theorem – an important concept in probability theory ...