Biased v Unbiased Samples

Which is the population?

• an entire deck of cards

• five heart cards

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which is the sample?

• blank NY state

• Red area on NY state

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which is the population?

• the jar

• the ones outside the jar

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A restaurant would like to evaluate the efficiency of its workers, so they observe the workers during the second shift. Is this a biased or un biased sample?

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

An airport randomly selects inspects every 8th suitcase that goes through security.

• Unbiased

• Biased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

To determine how many students plan to attend the school musical, Maria surveys 100 random people in the hallway.

• Biased

• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

To determine how many homes in his neighborhood plan to hand out candy on Halloween, Daniel chooses one street at random and surveys each household on that street.

• Biased

• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

At the end of the year, a math teacher decides to survey his students to determine what they liked best about his class. He uses his first period class as his sample.

• Unbiased

• Biased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

To check lightbulbs for defects, 500 random bulbs from a certain production line are checked.

• Unbiased

• Biased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A total of 125 people were surveyed at the bake shop. What percent reported pumpkin pie as their favorite?

• 6.4%

• 80%

• 12%

• 20%