NAME: ___________________________________________
DATE: ______________
Random Sampling Worksheet – Independent Practice
Directions: Read each example and circle “YES” or “NO” to indicate your response. Give a short
explanation for your answer choice.
1) Juan asked 10 of his friends what they thought about a new video game.
Is this sample of the students in the school biased?
YES NO
______________________________________________________________________________
______________________________________________________________________________
2) Brittany polled the first 47 bus riders at school about cafeteria food.
Is this sample of the student population biased?
YES NO
______________________________________________________________________________
______________________________________________________________________________
3) Jake surveyed the 7 fastest runners in P.E. class about their favorite class.
Is this a random sample of the students in the school? YES NO
______________________________________________________________________________
______________________________________________________________________________
4) Mr. Johnson looked at 3 different problems from each test given last year. Each test had the
same number of problems.
Is this sample of the test problems assigned likely to be biased?
YES NO
______________________________________________________________________________
______________________________________________________________________________
5) A survey was conducted of 13 shoppers who spent the most at the mall last month.
Is this sample of the shoppers at the mall likely to be biased? YES NO
______________________________________________________________________________
______________________________________________________________________________
© Copyright 2014. All rights reserved. www.cpalms.org
NAME: ___________________________________________
DATE: ______________
Answer Key:
1. YES.
Sample Explanation: All of Juan’s friends may like the same game.
2. YES.
Sample Explanation: Bus riders may not be representative of the rest of the school population.
3. NO.
Sample Explanation: The seven fastest runners do not fairly represent the school population.
4. NO.
Mr. Johnson is taking random samples of all tests.
5. YES.
These shoppers probably like the mall, but everyone else might not like the mall.
© Copyright 2014. All rights reserved. www.cpalms.org