A bell curve is a graph used to visualize the distribution of a set of chosen values across a specified group that tend to have central, normal values that peak, with low and high extremes ...

What Is the Normal Distribution? The normal distribution formula is based on two simple parameters— mean and standard deviation —that quantify the characteristics of a given dataset.

THIS little volume is a kind of “Molesworth” for the statistical biologist. Some two-thirds of the book are taken up with numerical tables (ordinates of normal curve, probability integral ...