Knafflic Ch 2 & 3

What should you never use to plot a single dimension?

3D pie charts

Slopegraphs are best used when you have multiple data points across multiple time periods.

False

Kyle's manager has asked him to show how many gallons of non-organic milk is sold in his store based on Whole Milk(3%), 2% Milk, Low Fat Milk (1%), or Skim Milk (.5%). What are good ways that Kyle could graph the monthly sales of milk breaking down the percentage of the 4 types of milk compared to the total of the 4 types of milk sold?

Horizontal Bar Chart with all 4 types of milk 100% Stacked Horizontal Bar Chart

If you need to plot data in different units from the main chart (Secondary Y-Axis), what are the two best methods that are generally better than added a differing axis to the right?

Label directly, pull apart vertically

If you have two variables that you need to put on a chart relative to each other, what chart type would you use?

Scatterplot

Heatmaps are a subset of what kind of visualization?

Table

What is the best method for conveying a single number or two?

Text

The author states that bar charts are avoided at times. Why is that?

They are common

A bar chart must start at zero for its baseline

True

Contrast helps our audience know where to focus their attention.

True

Text at a 45° angle takes over 50% more time to read than standard horizontal text.

True

The perceived cognitive load of the audience is a bigger factor for engaging the audience than actual cognitive load.

True

When the author wrote the book, Storytelling with Data, she said she had created well over 100 visuals in the past year. Out of all of those visuals available to her, she only used 12 different kinds.

True

As a general rule, what is the right graph to use for a given situation?

Whatever is easiest for the audience to read