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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

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Exercise 3 Page 265

A cluster is a group of points that lie close together.

Relationship: None
Outliers: None
Gap: None
Cluster: From 11 to 13

Practice makes perfect

A scatter plot is a graph that shows the relationship between two data sets. Let's begin by reviewing different relationships between data.

scattered plot

Now, let's consider the given scatter plot.

scattered plot

Since the points show no pattern, there is no relationship. Next, let's recall some important definitions.

Outlier	Cluster	Gap
An outlier is a data point that is set off from the other data points.	A cluster is a group of points that lie close together.	A gap is an area on the graph that contains no data.

With these definitions in mind, we can finally make some conclusions about the outliers, clusters, and gaps in our graph.

There are no outliers.
There is a cluster of data from 11 to 13.
There are no gaps in the data.

Subchapter links

1 Scatter Plot p.265

2 Lines of Fit p.266

3 Two-Way Tables p.266-267

4 Choosing a Data Display p.267