The normal distribution (also known as the Gaussian distribution) is arguably the most important distribution in Statistics. It is often used to represent continuous random variables occurring in ...

A prediction interval on k future observations is an interval which is said to contain the values of all k such observations with a specified probability based on the results of a past sample of n ...

Forecasting for any small business involves guesswork. You know your business and its past performance, but you may not be comfortable predicting the future. Using Excel is a great way to perform what ...

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 39, No. 2 (1990), pp. 255-257 (3 pages) This paper proposes a logistic approximation to the normal tail probability and ...