In statistics, the collection of n examples is called a sample of size n. Strictly speaking, m is the sample mean and v is the sample variance. The exact mean is the sample mean for an infinitely large collection, and similarly for the variance. We will be a little careless here and refer to the sample mean as the mean.

Also, it is more conventional to denote the mean by and the variance by , where is called the standard deviation. We use m, v ans s merely because Roman symbols are easier to enter in HTML.

Up arrow Go back