# Interpret all statistics for a histogram

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

## N

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

## Mean and standard deviation

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.

## Minimum

The minimum is the smallest data value.

In these data, the minimum is 7.

 13 17 18 19 12 10 7 9 14

### Interpretation

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

## Maximum

The maximum is the largest data value.

In these data, the maximum is 19.

 13 17 18 19 12 10 7 9 14

### Interpretation

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

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