random and biased sample

Choose the true statement(s) about the census and sample shown.

• The sample could be considered too small.

• The sample is biased because is does not include everyone.

• The sample is representative of the population's sub-groups.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Suzie examined 7 flowers in each planter at the mall.  Each planter has an equal number of flowers.  Is this sample of the flowers at the mall likely to be representative?

• yes
• no

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Biased or Random?

Audi wants to find out how students get to school at Churchill so she places the names of all students into a fish bowl and pulls out 50 so she can survey them.

• Biased sample

• Random sample

Tags

CCSS.HSS.IC.B.3

Josie threw a handful of identically shaped buttons into the air, then collected the 27 buttons that landed in a target on the floor.  Is this a random sample of the buttons?

• yes
• no

Tags

CCSS.HSS.IC.B.3

Elise, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they like most about the store. She interviewed the 22 who said yes. Is this sample of the supermarket's customers likely to be biased?

• yes

• no

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

4. A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Zeke wants to find out how 7th graders at OMS get to school so he places the names of all 7th graders into a fish bowl and pulls out 50 names so he can survey them. Random or Biased?

• Random

• Biased

Tags

CCSS.HSS.IC.B.3

Biased or Random?

Marissa wants to learn what the most popular board game in the United States is, so she creates a poll and shares it on Twitter.

• Biased sample

• Random sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1