6th Grade Math Textbook, Progress

Write whether one would be most likely to find a biased sample

for the survey at each location. Write Yesor No. Explain.

1. Favorite food; Italian restaurant 2. Favorite holiday; shopping mall


2. Favorite sport; football game 4. Favorite music; park

Write whether the question is biasedor unbiased. Explain.

5. What is your favorite kind of cereal? 6. Is gym your favorite school subject?


6. Do you think corn flakes are the 8. Is pizza your best choice for lunch?
   best cereal?

Explain how the data displays can influence how the results

are interpreted.

9.

A survey about type of phone preference, land line or cell phone, was made.

Use the table for problems 10–11.

10. How may sample A be biased?
    Give an example in which that
    bias may be eliminated.


11. Which sample may be the
    least biased? Explain.

A Every 20th number in a phone

directory is called.

B People walking in a park are randomly

chosen and asked questions.

Sample How Selected

12. Suppose you need to find out the favorite vacation spot of the students in
    school. If you cannot survey everyone, explain how you could sample the
    population so that the sample is least likely to be biased. Then write one
    question you could ask that would be biased and one question that would
    not be biased. Explain why you think your biased question is biased.

Color

Number of Cars

0 200 400 600

Black

Blue

Red

White

Yellow

Cars on Expressway

(6:00 P.M.)

Color

Number of Cars

0604020

Black

Blue

Red

White

Yellow

Cars on Expressway

(2:00 A.M.)

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