**Frequency distribution by Rule Sturges**

To construct a frequency distribution by rule Sturgess need to find three data.

**1. The number of classes (k).**

To calculate the number of classes needed in our distribution the following formula is used

k = 1 + 3.322 log n

Where n is the amount of data in our sample , the value of k must be an integer , therefore , you should always round up to the nearest whole number.

**2. The range of our data (R).**

Range is as follows :

R = higher value - lower value

**3. The amplitude of each class. (A).**

To the extent the following is done :

A = k / R

The explanation of the construction of the frequency distribution by rule Sturgess with Excel.

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