Biased or Unbiased

To get valid results, a sample must be...

• biased

• unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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 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

A sample should be

• representative of  only middle school students only
• a very large group
• representative of the population
• representative of people who volunteer

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

• The sample is biased because it contains only people at the state park.

• The sample is biased because it contains only people who are environmentally conscious.

• The sample is biased because it contains only people who are outdoor minded.

• The sample is unbiased.

• The sample is unbiased

• The sample is biased because she is surveying only people at the mall.

• The sample is biased because she doesn't know if the people even watch television.

• The sample is biased because she is interested in only their favorite show.

• The sample is unbiased.

• The sample is biased because he asks only people who own cars.

• The sample is biased because he asking people as they enter the dealership.

• The sample is biased because he is asking people at only one car dealership.

• the students on her bus

• her homeroom class

• students waiting in the carpool area

• members of the cycling club

Tags

CCSS.HSS.IC.A.1

CCSS.7.SP.A.1

• The sample is biased because only smart students were surveyed.

• The sample is biased because only students at the library were surveyed.

• The sample is biased because only book loving students were surveyed.

• The sample is unbiased.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3