How to Make a Bar Graph
Hello and welcome back, class! Today we'll be looking at how to make and create a bar graph. I will be demonstrating how to make a vertical bar graph.
1. Decide on a title. In this case, the title will be based on your subject for your flowchart in an APDD Investigation. (For example, What Colour Are You?)
2. Draw the horizontal and vertical axis (the lines on the left and bottom of your chart).
3. Label the horizontal axis. (For example, 'Colour'.)
4. Above the horizontal axis's label, label the bars (for example orange, blue, red, etc.).
5. Label the vertical axis. (For example, 'Number of People'.)
6. Decide on the scale. What is the least greatest number on the scale, and which is the greatest? In what range will the numbers go in? (For example, the least greatest number is 0 and the greatest number is 30. 0 + 5 = 10, 10 + 5 = 15, etc.)
7. Draw a bar for each label, with different colours to make it easy to tell apart data.
Interpreting the Data
After creating the bar graph to full effort, you can step back and take notes on important aspects of the data.
1. Outliers. Outliers are data that often come far away from the average or most frequent piece of data, for example '30 people' would be an outlier because the average data is far below it, being '10 people'.
2. Gaps. Look for gaps in the data, for example '0 people like the colour white' would be a gap because there is no data for the colour white.
3. Frequency. Look for frequency in certain data, for example the most common occurrence would be 10 people liking a colour.
Remember to take notes on these data types. They will be very important on creating the conclusion (which is what we'll touch on in the next course).
