Populations and Sampling

Mr. Thrasher wants to know how the students at Cedar Bluff rate the cafeteria. He surveyed the hungry baseball team after practice last week to rate the school cafeteria. Is this a biased sample of the school's population?

• Yes, because it only asked one group of students

• No, the baseball team has the smartest students

• Yes, because it's voluntary survey

• No, the baseball team are good food critics

Cherokee County Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective. What is the population in this situation?

• 230 Teachers

• All Cherokee County teachers

• All Cedar Bluff teachers

• All Sand Rock and Spring Garden students

Identify the Sample: The Huddle House wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The manager at Huddle House concluded that most customers do not order dessert. What is the SAMPLE in this scenario?

• 20 customers from Huddle House

• All customers from Huddle House that evening

• 8 customers from Huddle House

• The employees from Huddle House

The population describes:

• The group of people, objects or events being surveyed

• a part of the group being surveyed

• the whole world

• the school

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.

7.SP.1

• A

• B

• C

• D

Coach Mullins surveys the students sitting in the back of her room by her desk. This can best be described as......

• Biased sample

• Random sample

• Convenience sample

Identify the population and sample for each example.

• Population: Students

  Sample: Members of the football team

• Population: Members of the football team

  Sample: Students

• Population: Students

  Sample: Students that have had a broken bone

• Population: Members of the football team

  Sample: Members of the football team that have broken a bone.

Determine if the following population would best be studied using the entire population or a sample.

Students in the state of Texas

• Entire Population

• Sample

• I love science!

Mrs. Cathy wants to know how many students at Cedar Bluff enjoy solving math word problems. What is the best sampling method?

• ask for 20 volunteers to discuss whether they enjoy solving math word problems

• ask the last 20 people to arrive at CB this morning

• Randomly ask 2 students in the hallway by Mr. B's room

• Ask every 20th student that walks into school