Random Sampling (Grade 7)

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Random Sampling

1. 
Surveying 2 people at a library about the types of books they like to read is an example of a representative sample.
  1. True
  2. False
2. 
Marley questions 2 athletes on her swim team about their dislike of swimming. This is a biased sample.
  1. True
  2. False
3. 
Students in an art class were surveyed to find if they were interested in becoming artists. This survey will most likely be biased.
  1. True
  2. False
4. 
10 members of the chess team were surveyed about whether they enjoyed playing board games. This is a biased sample.
  1. True
  2. False
5. 
A prize was raffled off by placing the names of all those who entered into a hat and pulling one name out. This is an example of an unbiased way to select the winner.
  1. True
  2. False
6. 
Mikey wants to estimate the number of students in his school who participate in a sport. Which of the following would be a random sampling method?
  1. he surveys the students in chorus
  2. he surveys 20 eighth grade students
  3. he surveys the students on the basketball team
  4. he surveys 50 students during each of the lunch periods
7. 
Which of the following would be the best way to estimate the average number of songs a seventh grade student in your school downloads each month?
  1. survey 25 sixth grade students in your school
  2. survey 2 seventh grade students in your school
  3. survey half of the seventh grade students in your school
  4. survey 100 seventh grade students from two middle schools
8. 
There are 40 students in the chorus. The chorus director needs an estimate of the number of students in this year's chorus who plan on joining next year. What would be the most reasonable number of students in the chorus to survey to get a representative sample?
  1. 1
  2. 10
  3. 35
  4. 40
9. 
There are 25 students in your English class. You want to determine if more students in your class enjoy reading or more enjoy writing. Which of the following would be the best way to randomly sample your class?
  1. ask all 25 students whether they prefer reading or writing
  2. ask 10 students in your English class whether they prefer reading or writing
  3. ask all the boys in your English class whether they prefer reading or writing
  4. ask your teacher whether more student in the class prefer reading or writing
10. 
The student council needs to estimate the number of students who plan to attend the seventh grade dance on Friday. Which of the following would be the most representative method for the student council to survey the students?
  1. ask their best friends if they plan on going to the dance
  2. ask all of the students in the 7th grade if they plan on going to the dance
  3. ask half of the students in the middle school if they plan on going to the dance
  4. ask 5 students from each of the 7th grade homerooms if they plan on going to the dance

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