Tables and Graphs

Name: Tables and Graphs
Author: StemPy Lab

Counting the answers is the first step. In this short course you build frequency tables, draw bar charts, pie charts, histograms and line graphs, choose the right graph for the data, and spot a graph that tells a false story.

3 lessons, about 1 h 25 min3 simulations10 problems6 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 25 min
Frequency tables
A frequency table lists each value and its frequency, the number of times it appears. Counting with tally marks makes this easy. The relative frequency is the frequency divided by the total, and as a percentage it lets us compare surveys of different sizes. The frequencies must add up to the number of cases and the percentages to 100. For numerical data with many different values, we group the values into class intervals.
1 simulation2 practice questions1 Python program2 problems
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Lesson 2about 30 min
Bar charts and pie charts
A bar chart has one bar for each category, with the height equal to the frequency and gaps between the bars because the categories are separate. A pie chart is a circle cut into slices that show how a whole is shared, and the angle of a slice is the frequency divided by the total times 360 degrees. Use a bar chart to compare categories and a pie chart to show shares of a whole. A good chart has a title, labelled axes and bars that start at zero.
1 simulation2 practice questions2 Python programs3 problems1 Python lab1 question set
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Lesson 3about 30 min
Histograms and line graphs
A histogram is for numerical data that has been put in groups, called class intervals. The bars touch, because the numbers continue from one group to the next, and the bar height is the frequency. The width of the groups changes the shape that we see. A line graph joins points over time, so that we can see a trend. A graph is misleading when its axis does not start at zero, or when it hides the scale.
1 simulation2 practice questions2 Python programs5 problems1 Python lab1 note
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Test Your Learning

Tables and Graphs: Practice Paper

10 questions · 15 min

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Tables and Graphs

Course outline (3 lessons)

Frequency tables

Bar charts and pie charts

Histograms and line graphs

Test Your Learning

Your teacher

Discussion (0)