Population and Samples

Complete the definition:

A _________ consists of all subjects (human or otherwise) that are being studied

• Statistics

• Number

• Group of people

• Population

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Complete the definition:

A _______ is a subset of a population

• sample

• group

• people

• statistics

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The town counsel wants to poll all the businesses in town on their store hours. They receive letters from 73 businesses in town.

Identify the Sample.

• 73 businesses who return the letters

• All businesses in town

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The town counsel wants to poll the businesses in town on their store hours. They sent out 200 letters to all the businesses in town, and 73 businesses returned the letter.

Identify the Population.

• 73 businesses who return letters

• All businesses in town

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Why do we randomly select our samples?

• because it is easier

• reduce bias to better represent the population

• so we don't get the same answers from everyone

Tags

CCSS.HSS.IC.B.3

In statistics, a sample should be...

• representative of junior high school students only

• everyone in the population

• representative of the population

• representative of people who volunteer

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Your class is studying the number of car commercials on television between 6 P.M. and 8 P.M. for five days. Which of these samples is the best sample for you to​ use?

• The commercials shown between 6 P.M. and 7 P.M. on a randomly chosen day

• The commercials shown between​ 6:30 P.M. and​ 7:30 P.M. on three randomly chosen days

• The first five commercials each of the five days

• The commercials during a random hour between 6pm and 8pm, on a random day.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A manager samples receipts of every fifth person in line. Out of 50 people, 4 had a mispriced item. If 600 people go to the store each day, how many can you expect to have a mispriced item?

• 50 people

• 80 people

• 48 people

• 12 people

Tags

CCSS.7.SP.A.2

A middle school has 490 students. Mae surveys a random sample of 60 students and finds that 24 of them have dogs. How many students are likely to have dogs?

• 8 students

• 40 students

• 192 students

• 196 students

Tags

CCSS.7.SP.A.2

A random sample of dogs at different animal shelters shows that 12 of 60 dogs are puppies. The cities shelters collectively house 1,200 dogs each year. Estimate how many are puppies.

• 50 puppies

• 240 puppies

• 20 puppies

• 600 puppies

Tags

CCSS.6.RP.A.3B