## 7QC Tools — How to Draw a Histogram?

Amrendra Roy

**First approach** is by using the readymade template from ASQ, __Histogram__

**Second approach** is by using Excel sheet, following are the steps involved

*Excel → data → data analysis → Histogram*

**Third approach** is manually, it involves following steps

Step-1: Calculate the range (maximum-minimum)

Step-2: Divide range by number of classes you want (usually 5 or 7). This will give you class width.

Step-3: Defining class intervals. This is done starting from the minimum value in the data set and by adding the class width (step-2) to it. This will give you 1st class interval.

Second class interval is obtained by adding class width to the upper class limit of the first class interval.

Step-4: Step-3 is repeated 5 to 7 times depending on the number of class interval (step-2)

Step-5: segregate the data according to the class interval, this will give the frequency of each class.

Step-6: plot the bar graph between classes and the frequency to give histogram.

**Fourth Approach**: Using Minitab

Step-1: Go to Graph in menu section and then click histogram

Step-2: Once you click the histogram, a menu will appear where you require to select the type of histogram desired.

Step-3: After selecting the type of histogram, another menu will appear which needs to be filled

After filling the above data, click OK to get the histogram

Related Blogs

*7QC Tools: Flow Chart, Know Your Process Thoroughly*

__7QC Tools: Fish Bone or Ishikawa Diagram__

__7QC Tools: How to Extract More Information from the Scatter Plot?__

__7QC Tools: How to Draw a Scatter Plot?__

__7QC Tools: Scatter Plot — Caution! Misuse of Statistics!__

__7QC Tools — How to Prioritize Your Work Using Pareto Chart?__

__7QC Tools — How to Interpret a Histogram?__

__7QC Tools — Histogram of Continuous Data__

__7QC Tools — Histogram of Discrete Data__

__Excellent Templates for 7QC tools from ASQ__

__What are Seven QC Tools & How to Remember them?__

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