A reader need go no further than page two ... bar chart. Histograms are used to show distributions of variables while bar charts are used to compare variables. Histograms plot quantitative data ...

Excel measures the distance between data points in a chart as a percentage ... points in the data series look unusual and might lead the reader to think that each bar is unrelated to the others.

I help people communicate data clearly with graphs. There are two main reasons ... the horizontal or x axis. A bar chart is judged by the length of the bar. I don’t like using lengths with ...

line graph – to ... that make up a whole bar chart – compare things that aren’t directly related scatter graph – look for a pattern or link between two sets of data ...