How to turn a Frequency table into a Histogram

By: Adam Batman and Micah Pistillo

What we will be showing you to do

Turning this... … into this

Steps

First you have to decide on a topic (we chose how many pizza slices you can eat in one sitting)

Then ask a group of people your questionWhile they answer put the data into a table

by putting all the answers on one side then the number of people on the other

Step 1 make a frequency table

After step 1

You should have this at step 1

An interval is an increment of numbers your data will go up by

It all depends on your data if you had 100 answers then your intervals could be by 10

For ours we had up to 36 was our highest number so are intervals were by 6

Step 2 decide on an interval

This is pretty self explanatory but just in case…

You just want to make a normal chart and put each interval on one side (for example: 1-6, 7-12, 13-18.. so on)

Then count how many people answer in each interval and put that many tallies or just the number

Step 3 Make a new chart with intervals on one side and tallies on the other

Your title should say something about your question and sometimes your group of people you asked

Ours was Number of pizza slices Mrs. Clark’s AA class can eat in one sitting

Step 4 Pick a title for your graph

Again self explanatoryYou want to make sure that your intervals

are on the right axis because if you put them on the vertical axis

You would not be able to graph the intervals

Step 5 Put your intervals on the horizontal axis

You should label your intervals on what your question was asking

For ours we had Number of Slices

Step 6 label your intervals

First you have to pick a number that can evenly go into it

You do not want such a small number that your graph will be huge

But you don’t want the numbers to be to big , then your graph will be to small

It should go up to the biggest number people in a interval

For our graph we went up by 5 because we had a total number of 28 people answering a 23 being the biggest bar

Step 7 Pick a number to go up by on the vertical axis

This should be the people you surveyed or just frequency works

On our graph we had number of people

Step 8 Label your vertical axis

Pretty explanatoryJust take your time when marking it between

the intervals try and make it as close as possible

Step 9 Count up the tallies per interval and make a bar

To be classified as a histogram the bars must touch

Step 10 Do for all others. Be sure bars touch one another

This is the final product