Sample and Population Math

Identify the Sample:
A restaurant wants to know if 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 restaurant concluded that most customers do not order dessert.

• 20 customers

• All customers

• 8 customers

• Dessert

Mrs. Boyd wants to find the average height of all her students in her classes. She decides to use the first 5 people who walk in the door. Is this a good representative sample?

• Yes

• No

Identify the Population:
Wicomico County Public Schools randomly selected 230 teachers to find out which technology resource is the most effective.

• 230 Teachers

• All teachers

• Students

• Wicomico County Public Schools

Population or Sample?

A police officer measures the speed of all the cars that pass a specific point on the road during his shift.

• Population

• Sample

The Magic Kingdom theme park has many attractions, one of which is Space Mountain. Are the people who ride Space Mountain the population or a sample of the theme park? Explain.

• Population. They are all the people at the theme park.

• Sample. They are a subset of all the people at the theme park.

• Both population and sample. They are all the people at the theme park

• Neither population nor sample. They are not the people at the theme park.

Russell randomly surveys 7th graders in his school and finds that 6 out of 30 attend summer camp. If there are 200 7th graders in his school, about how many are expected to attend summer camp?

(hint-set up a proportion)

Which team has the higher median?

• Team A

• Team B

The dot plots show how long it took the 20 students in Mr. Novick’s two math classes to finish their math homework last night.

What is the mean of first period?

The dot plots show how long it took the 20 students in Mr. Novick’s two math classes to finish their math homework last night.

What is the mean of 2nd period?

What is Team A's Median?