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Back to Contingency Tables

Exercise 2

Avg difficulty 2.5

A recent survey asked a random sample of PCC students if they have purchased food from the cafeteria in the last week, and if they purchased their textbooks through the bookstore. Fill in the missing entries of the contingency table below.

BookstoreNo BookstoreTotal
Cafeteria375
No Cafeteria135
Total630850

Lee et al., Math in Society, §4.1 Contingency Tables, Exercise 2

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Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.