Random Sample

Non-Random Sample

A cereal company surveys their employees about breakfast food preference.

A farmer is choosing grains of wheat from a field to test for a new flavor of cereal.

Ten college students at a college, population 50,000, are chosen to taste test a new cereal.

A cereal company puts a winning ticket in one box of cereal out of 100,000 boxes.

Customers buying a new cell phone are surveyed about cell phone plans.

Every twentieth caller to an independent ratio station receives tickets to a concert.

A phone plan company surveys people on the beach to see how well they are receiving service, and uses this information in future advertising.

A phone survey is conducted using twenty names randomly taken from the phone book.

Henry asks five of his friends to fill out a survey out their favorite musicians.

The five employees who work the late shift answer questions about management.

The five people seated on the first row at the circus are asked their opinion about the animal acts.

Five employees out of 2,000 are chosen randomly to complete and anonymous survey.

Survey every tenth student as the leave Chorus practice.

At football practice, survey every third player as they take a water break.

Put all students’ names in a hat and survey the first 100 pulled from the hat.

Survey every 10th person leaving a Dallas Cowboys game to find out what is the most popular team in the USA.

Survey every 16th person at Walmart to find out which laundry detergent is most popular.

Chris has 4 boxes of red, green, and blue marbles Chris has 4 boxes of red, green, and blue marbles. He mixed all the marbles and picked 16 marbles without looking.

George put some cards into a basket George put some cards into a basket. Then, he drew 3 cards out of the basket.

You want to know what 7th graders think of their science class You want to know what 7th graders think of their science class. You poll 100 7th graders.