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Lesson 3 Practice Problems
Problem Statement
Which value would best t in the missing cell to suggest there is no evidence of an association between the variables?
A. 9 B. 18 C. 27 D. 54
Solution
A
digital watch
analog watch
displays the date
54
27
no date display
18
Problem Statement
The relative frequency table shows the percentage of each type of art (painting or sculpture) in a museum that would classify in the di erent styles (modern or classical). Based on these percentages, is there evidence to suggest an association between the variables? Explain your reasoning.
modern
classical
paintings
41%
59%
sculptures
38%
62%
Solution
Sample response: There is not enough evidence to suggest an association. Since the two types of art have similar percentages of each style, there is no reason to believe there is an association.
Problem Statement
Data is collected about the number of wins and losses by a random sample of teams with an animal mascot and those with another kind of mascot. The column relative frequencies are
Unit 3 Lesson 3 Practice Problems 43