Biased and Unbiased Samples

Simple random sample and systematic random sample are two types of ...

• biased samples

• unbiased samples

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Convenience sample and voluntary response sample are types of...

• biased samples

• unbiased samples

To determine if my students like Math, I surveyed every 3rd student that walked into my classroom. This is an example of a ...

• simple random sample

• systematic random sample

• convenience sample

• voluntary response sample

To determine how many students at Shull would attend the dance, the principal surveyed the students in Ms. Miller's math class. 10 students said they would attend and 15 said they would not attend. It can be concluded that half the students at Shull will attend the dance. Is this conclusion valid? Why or why not?

• Yes, this is a simple random sample. So the sample is unbiased.

• No, this is a convenience sample. So the sample is unbiased.

• No, this is a voluntary response sample. So the sample is biased.

• No, this is a convenience sample. So the sample is biased.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.2

The student councel advisor asked every 10th student in the lunch line how they prefer to be contacted with school news. Will his sample method be more likely to give valid or invalid results?

• unbiased

• biased

Tags

CCSS.HSS.IC.A.1

CCSS.7.SP.A.1

At her field hockey practice, Janet surveyed the athletes on the girls' hockey team to determine which sports teenagers like best.  Will here sampling method be likely to produce valid or invalid results? 

• Valid
• Invalid
• I don't know

Tags

CCSS.HSS.IC.A.1

CCSS.7.SP.A.1

Time Magazine wants to know which topics their readers prefer. The magazine editors decide to put a survey in their magazine and asks readers to fill it out and send it back. Is this sampling method likely to produce fair or unfair data?

• fair

• unfair

Tags

CCSS.RL.11-12.6

2.  A homeowner divides their backyard into 5 sections, and randomly removes soil from sections.

• Biased
• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

7. A public library asked every 10th person who entered to name the type of book they were getting

• Biased
• Unbiased

Tags

CCSS.6.SP.A.1

5. The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.

• Biased
• Unbiased