Population and Random Sample

A sample in which every person, object, or event has an equal chance of being selected.

• Random sample.

• Biased sample.

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• Thirty randomly selected students from her school

• Thirty students who are rarely tardy

• thirty of her friends

_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.

• Sample

• Population

• Random Sample

• Quartile

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

• Sample

• Population

• Random Sample

• Quartile

True or False: all samples lead to a good prediction about an entire population.

• True

• False

A school principal wants to see which subject the 695 students in his school liked best. Which choice BEST represents a representative sample?

• The girls in the school.

• 1 classroom for each grade

• All the students in the school.

• The students making a B in math.

The entire group studied.

• sample

• population

A sample that is by chance.

• random sample

• stratified sample

• systematic sample

What is the sample and population?
Number of McDonald's in a 25 miles² area of Maui...

• Population:  Number of McDonald's
  Sample:  25 miles² of Maui

• Population: 25 miles² of Maui
  Sample:  Number of McDonald's

• Population:  25 miles²
  Sample:  Maui

• Population:  Maui
  Sample:  Number of McDonald's

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

• All of the kids who buy toys.

• 275 rich kids

• 200 random kids of all ages

• 292 boys ages 7-15