Bar Charts & Pictograms Flashcards

All 7 cards in this deck

What are the steps to draw a bar chart from a frequency table?
e.g. May 20, June 35

1. Choose an even scale on the vertical (frequency) axis: 0 to 40 in 5s
2. Draw a bar of equal width for each category at its frequency: May to 20, June to 35
3. Label both axes and leave gaps between the bars

What does the key on a pictogram tell you?

How many items each whole symbol represents.
e.g. one symbol represents 2 hours of sunshine

How do you show a frequency that is not a whole number of symbols on a pictogram?
e.g. show 11 where one symbol represents 4

Draw part of a symbol for the remainder.
2 full symbols and 3 quarter symbols

What is a dual bar chart?

A bar chart with two bars drawn side by side for each category, with a key saying what each colour stands for.

What is a composite (stacked) bar chart?

A bar chart where one bar per category is split into sections, so the whole bar shows the total.

What is a vertical line chart and what data is it used for?

A chart of single vertical lines instead of bars, used for ungrouped discrete numerical data.

True or false? On a bar chart for categorical data the bars should touch each other.

False.
The bars are equal width with gaps between them.