Samples and Population Math

Before a nation wide election, a polling place was trying to see who would win. Which choice BEST represents a sample?

• All voters

• A selection of male voters

• A selection of votes from one part of the nation

• A selection of voters from all over the nation

Which choice BEST represents a population?

• Every person who owns more than 3 cars

• Every person in the state

• A selection of people from each neighborhood

• A selection of people who live in small towns

A mayor wanted to see if the people in his town thought he was doing a good job.

Which choice BEST represents a sample?

• The residents of the town

• The people who voted for the mayor

• 1000 unemployed voters

• The residents of 6 different neighborhoods

Which choice BEST represents a population?

• 145 male and female employees

• 6943 children, ages 5 - 15

• A selection of shoppers from different states

• Every person in the United States

What is the mean of the following set of numbers: 4, 8, 12, 16, 20?

Mathematical Equivalence

ON

A toy store owner tracking how much kids spend each month on toys. Which choice BEST represents a sample?

• 257 boys age 7 - 15

• All of the kids who buy toys

• 277 rich kids

• 206 kids from age 10 to 15

Which of the following is a random sample?

• Asking people attending a football game what their favorite sport is

• Asking people standing in line to buy a PS5 whether they prefer XBOX or Playstate

• Asking the band students at a school if more money should be spent on athletics

• Asking every 3rd student to walk in the building what their favorite breakfast is

You want to estimate the number of 7th grade students that walk home right after school. Which sample is unbiased?

• Three 7th grade students randomly selected in the hallway before homeroom

• 7th grade members of the Science Olympiad team

• Every fifth 7th grader walking down the sidewalk after school

• Every fifth student from an alphabetical list of the 7th grade

As part of a 7th grade statistics project, the teacher brings a candy jar full of gumballs (red & green). The assignment is to estimate the proportion of red gumballs in the jar. Suppose one of the students draws 25 gumballs from the jar: 8 are red, 17 are green. What is the SAMPLE?

• 25 gumballs drawn

• all gumballs in the jar

• the students

• the 17 green gumballs

_______ is the entire group of objects or individuals considered for a survey.

• Sample

• Quartile

• Random Sample

• Population