Comparing the Results of a Survey

Lesson 9.6

Homework Review: Study Link 9.5

Mental MathFor each fraction, write the equivalent decimal and

percent on your white board.

Example: You would write: ____ and ____ 4

1

10

1

5

3

4

3

20

19

3

9

Math Message

Use your calculator to rename these fractions as percents. Round to the nearest WHOLE

percent.Record your answers in your Math Notebook.

47

2,

59

42,

78

57,

63

18

Do you think it is more likely that a person will…

Let’s vote…• read a book or go to a movie?

book ____ movie ____

• eat breakfast or eat at a fast-food restaurant?

eat breakfast ____ eat fast-food ____

• like liver or like Mondays?

liver ____ Mondays ____

Tabulating our Results

• Combine the results from all of the surveys

• How can we do this efficiently?

The Results…

Record our

findings on MJ p.

261

Analyze the Results…

Now, do you think it is more likely that a person will…

• read a book or go to a movie?

book ____ movie ____

• eat breakfast or eat at a fast-food restaurant?

eat breakfast ____ eat fast-food ____

• like liver or like Mondays?

liver ____ Mondays ____

Suppose that 45 out of 50 people interviewed read a book and that 57

out of 78 people saw a movie last month.

• Is it correct to conclude that because more people saw a movie than read a book, people are more likely to go to the movies than to read a book?

• Does the total number of people interviewed need to be taken into account?

Percents are USEFUL!

• When fractions have the same denominator, it makes them easy to compare!

• Every percent has the same

denominator, 100, making it easy to compare information.

Find the percents to analyze…