HH.8

Populations and samples

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HH.8Populations and samplesYHZ

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A high school principal has several proposals on her desk for new physical education courses. She wonders which course would be most interesting to students, but it would take a long time to survey each of the school's 1,200 students. Instead, she randomly surveys 25 students in each grade to see which course they are most interested in.

What are the population and the sample of the principal's survey?

The population is

the students currently enrolled in a physical education course

the

students in each grade who are surveyed

the

1,200

students at the high school

the students in each grade who are not surveyed

the students currently enrolled in a physical education course

the

students in each grade who are surveyed

the

1,200

students at the high school

the students in each grade who are not surveyed

. The sample is

the students currently enrolled in a physical education course

the

students in each grade who are surveyed

the

1,200

students at the high school

the students in each grade who are not surveyed

the students currently enrolled in a physical education course

the

students in each grade who are surveyed

the

1,200

students at the high school

the students in each grade who are not surveyed

ref_doc_title.

Learn with an example

question

The principal of Jackson Middle School wants input from the students before he decides on a name for the school's new mascot, a cheetah. It would take too long to collect suggestions from every student at the school, so he polls the Student Council members for ideas. The name Flash is suggested most often.

What are the population and the sample of this poll?

The population for this poll is

the students who are not Student Council members

the students who suggested the name Flash

the Student Council members

the students at the school

the students who are not Student Council members

the students who suggested the name Flash

the Student Council members

the students at the school

. The sample is

the students who are not Student Council members

the students who suggested the name Flash

the Student Council members

the students at the school

the students who are not Student Council members

the students who suggested the name Flash

the Student Council members

the students at the school

key idea

A population is a set of objects or living things that a researcher wants to learn something about.

When the population is too large or too difficult to study, the researcher may study a representative

sample,

or part, of the population.

solution

The principal of Jackson Middle School wants input from the students before he decides on a name for the school's new mascot. So the population is the students at the school.

It would take too long to collect suggestions from every student at the school, so he asks the Student Council members for ideas. This means the sample is the Student Council members.

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