William Playfair, the father of data visualisation, changed the way we understand information. His bar graphs, pie charts, ...

Bar graphs are used to show sets of data in more specific categories. 32 students were asked which season was their favourite. The table shows the results. Construct a bar chart that represents ...

From the bar graph above, the main points are: Each bar has its own label on the horizontal axis There is a scale on the vertical axis The bars are of equal width ...

There are three measures of central tendency for data. One is the mean or x-bar, and the others are the median and mode. When you’re diving into statistical analysis, these are basic components. Most ...