Find definitions and interpretation guidance for every statistic that is provided with a histogram.

The sample size (N) is the number of nonmissing observations for a Y variable or a group.

A normal distribution is defined by two parameters: the mean and the standard deviation. When you fit a normal distribution, Minitab estimates these parameters from your sample. The mean defines the peak or center of a normal distribution. The standard deviation defines the spread of a normal distribution. For example, the following graph shows normal distributions with means of 1 and −1 and with standard deviations of 1 and 2.

The minimum is the smallest data value.

In these data, the minimum is 7.

13 | 17 | 18 | 19 | 12 | 10 | 7 |
9 | 14 |

One of the simplest ways to assess the spread of your data is to compare the minimum and maximum.

The maximum is the largest data value.

In these data, the maximum is 19.

13 | 17 | 18 | 19 |
12 | 10 | 7 | 9 | 14 |

One of the simplest ways to assess the spread of your data is to compare the minimum and maximum.