CC.2.4.8.B.2
Understand that patterns of association can be seen in bivariate data utilizing frequencies.
Example Problems
A bookstore surveyed customers on preferred book format.
How many students prefer eBooks?
| Format | Hardcover | Paperback | eBook |
|---|---|---|---|
| Students | 20 | 35 | 45 |
| Adults | 50 | 40 | 10 |
How many students prefer eBooks?
An online retailer surveyed customers on device used for shopping by region.
How many South region customers used desktop?
| Region | Desktop | Mobile | Tablet |
|---|---|---|---|
| North | 80 | 120 | 20 |
| South | 70 | 110 | 20 |
How many South region customers used desktop?
A tech conference surveyed attendees on session interest by role.
How many developers are interested in networking?
| Role | Technical | Managerial | Networking |
|---|---|---|---|
| Developer | 80 | 20 | 30 |
| Executive | 10 | 50 | 40 |
How many developers are interested in networking?

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