Chapter Review
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What types of data displays do you know?
Example Solution: A line graph, see solution.
Let's recall the types of data displays we can use to describe a data set.
| Data Display | When Do We Use It? | Key Phrase |
|---|---|---|
| Pictograph | To show data using pictures | Pictures |
| Dot Plot | To show the number of times each value occurs in a data set | Times each value occurs |
| Stem-and-Leaf Plot | To show how ordered numerical data are distributed | Distribution of ordered values |
| Box-and-Whisker Plot | To show the variability of a data set by using quartiles | Variability |
| Circle Graph | To show data as parts of a whole | Parts of a whole |
| Bar Graph | To show frequencies of data values in specific categories | Category frequency |
| Histogram | To show frequencies of data values in intervals of the same size | Frequency and intervals |
| Line Graph | To show how data change over time | Change over time |
| Scatter Plot | To show the relationship between two data sets using ordered pairs plotted in a coordinate plane | Relationship of two data sets, coordinate plane |
Now, we want to choose an appropriate data display for the following situation.
|
the numbers of pairs of shoes sold by a store each week |
Here we want to show how the number of pairs of shoes sold change over time — week by week. Therefore, we can use a line graph. The line graph for this situation could look like the following.