### Home > CCA2 > Chapter 9 > Lesson 9.1.1 > Problem 9-7

9-7.

Read the Math Notes box in this lesson. For each question, describe the population of interest. Then state whether a census is practical or whether it makes more sense to take a sample. Justify your response.

What is the average time it takes U.S. employees to commute to work?

Population: U.S. employees. The population is too large to conveniently measure so sampling should be used.

What is the average bedtime for students in your math class?

Population: students in the class. A census can be taken.

How much Vitamin A is in an average carrot?

What is the public approval rating of the Governor?

How much weight can an elevator cable support?

What are your friends’ favorite movies?