Big Ideas Math: Modeling Real Life, Grade 8
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Big Ideas Math: Modeling Real Life, Grade 8 View details
4. Choosing a Data Display
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Exercise 5 Page 257

A stem-and-leaf plot is a type of data display that orders numerical data and shows their distribution.

Not appropriate, see solution.

Practice makes perfect
Using a stem-and-leaf plot, we want to show the change of the number of hits for our school's new website during the 5 months based on the given table.
Month Hits
August 250
September 320
October 485
November 650
December 925

Recall that a stem-and-leaf plot is a type of data display that orders numerical data and shows their distribution. Notice that our table does not have values that share the number in the hundred place, so in each row we will have only number.

stem-and-leaf plot
The stem-and-leaf plot does not show which number of hits fits each month or how this number changes over time. Therefore, this data display is not appropriate for this situation.

Extra

Types of Data Displays

Let's recall the types of data displays we can use to describe a data set.

Data Display When Do We Use It?
Pictograph To show data using pictures
Dot Plot To show the number of times each value occurs in a data set
Stem-and-Leaf Plot To show how ordered numerical data are distributed
Box-and-Whisker Plot To show the variability of a data set by using quartiles
Circle Graph To show data as parts of a whole
Bar Graph To show frequencies of data values in specific categories
Histogram To show frequencies of data values in intervals of the same size
Line Graph To show how data change over time
Scatter Plot To show the relationship between two data sets using ordered pairs plotted in a coordinate plane