7.SP.1 Sampling & Populations & 7.SP.2 Drawing Inferences

A coach wants to know the favorite snack purchased at the concession stand during football games. Which is the best sample for the coach’s survey?

• students getting off the bus

• teachers at the school

• the football team players

• students entering the football stands

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

At a middle school, the administration wants to know how most students get to school. Which sample would be considered a biased sample?

• every 10th student entering the library

• every 10th student getting off a bus

• every fifth student from an alphabetical list

• one student randomly chosen from every homeroom

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

A sports writer wants to know which is the most popular college basketball team. Which group of people would give her the least biased answer?

• every 4th person entering a college dining hall

• every 4th student watching a game being played

• every 4th student at a freshman orientation

• every 4th person entering a grocery store

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Biased or Random?

Mr. Goldsmith wants to determine who the best teacher in all of Menifee County is, so he asks every 7th grader who their favorite teacher is.

• Biased

• Random

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

Biased or Random?

Zane wants to determine the favorite candy among all 7th graders. So he asks all the people who sit in his row in Math class.

• Biased

• Random

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Biased or Random?

Cassandra and Isabella want to determine the favorite subject of all students in the middle school. So they place every middle school student's name in a bucket and choose 30 to poll.

• Biased

• Random

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Drake made 14 out of 20 free throw shots. How many out of the next 30 free throw shots would you expect him to make?

• 20

• 21

• 22

• 25

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

A high school has 1500 students.  In a random sample of 50 students, 32 own one or more pets.  Predict the number of students at the high school who own one or more pets.

• 480
• 960
• 48
• 96

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

A small town as 2,500 residents.  In a random sample of 125 residents, 2 have the flu.  Predict the number of residents of the town who have the flu.

• 20
• 40
• 200
• 400

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Which of the following illustrates Voluntary Sampling?

• Choosing every 10th person out of a population of 5000 to participate in a survey.

• Emailing an optional survey to members of a local university.

• Collecting equal amounts of data from age subgroups (20-39, 40-59, 60+).

• Texting our friends to gain their opinion of a topic.