# Unit 3 Lesson 2 Practice Problems

1. A teacher asks their students whether they studied for a quiz, then scores the quiz. A relative frequency table displays some of the information they collected.       What does the 86% represent?

2. The accessory choices of 143 people are recorded in the table.               Create a relative frequency table that could be used to show the percentages of belt wearers who wear a watch or not, as well as the percentages of people without belts who wear a watch or not.

3. Scientists give two different treatments to people who have the flu and determine if their health improves. The results for the test are in the two-way table. a. What percentage of people receiving treatment 1 had improved health? b. What percentage of people receiving treatment 2 had improved health?

4. A group of people are surveyed about whether they have any brothers or sisters or are an only child, and whether they have any pets.                Which value could go in the blank cell so that the percentage of only children that have no pets is 37.5%?

Select all that apply
• A
• B
• C
• D