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WorksheetsProbability Bias
Total questions: 12
Worksheet time: 7mins
Name
Class
Date
1.
1. A sample in which every person, object, or event has an equal chance of being selected.
a)
A. Random sample.
b)
B. Biased sample.
2.
3. A public library asked every 10th person who entered to name the type of book they were getting.
a)
A. Biased
b)
B. Unbiased
3.
4. Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
a)
A. Biased
b)
B. Unbiased
4.
5. A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
a)
Biased
b)
Unbiased
5.
7. The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?
a)
A. The students will be selected from the choir.
b)
B. The students will be selected randomly throughout the school.
6.
10. A teacher decides to survey the students in her classes to find out their opinion on the new menu in the cafeteria. Is this biased or unbiased?
a)
Biased
b)
Unbiased
7.
11. Larger random sample sizes are more representative of a population.
a)
A. True
b)
B. False
8.
12. Which random sample is the more likely it is to represent the population of a Jupiter Middle School accurately?
a)
A. Five students of a school.
b)
B. Five hundred students of a school.
9.
14. Biased questions lead people to answer a particular way.
a)
A. True
b)
B. False
10.
15. Is the following question biased?
Are stoplights needed at the intersection of Main and Perry Streets?
Are stoplights needed at the intersection of Main and Perry Streets?
a)
A. Not biased/ Unbiased
b)
B. Biased
11.
A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?
a)
The sample didn't include students.
b)
The sample is too small.
c)
The sample can only be accurate if each teacher is included in the sample
12.
Which scenario would produce the least biased results?
a)
asking athletes at a gym what their favorite television show is
b)
asking shoppers at a store where their favorite place to shop is
c)
asking fans at a baseball game who their favorite baseball team is
d)
asking students in a college library what their favorite college sports team is
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