Page 112 - IM_Algebra1_FL Print Sample.pdf

Solution
Sample response. There appears to be an association between the variables. About 47% of the swimmers in the outdoor pools were younger, while only about 20% of the swimmers in indoor pools were younger. Since there is a large di erence in the percentages, it suggests an association between the pool type and age groups that swim there.
Problem Statement
Data from a random sample of people are collected about how they watch movies in the genres of action or mystery. Which value would best t in the missing cell to suggest there is no association between the genre and how the movies are watched?
A. 19 B. 89 C. 147 D. 320
Solution
B
streaming movies
disc rental
action
526
147
mystery
317
Problem Statement
Two types of soil are used to grow corn to see if there is an association between the type of soil and the time it takes to reach harvest readiness. Due to the di culty in making soil B, there were only 100 corn plants grown in that soil type. Complete the table so that it suggests no association between soil type and time to reach harvest readiness. Explain your reasoning.
soil A
soil B
less than 80 days
279
80 days or more
131
Unit 3
Lesson 3 Practice Problems 45