7th grade math Sampling and populations

Harry collects data from a random sample of seventh-graders. Out of 25 respondents, 10 ride the bus to school. Out of 150 seventh-graders who attend Harry's school, how many would be expected to ride the bus to school?

• 40 seventh-graders

• 50 seventh-graders

• 60 seventh-graders

• 90 seventh-graders

The drama teacher wants to determine where the drama club should go to celebrate their final performance. Which of the following is NOT a representative sample?

• Students who do not act.

• Every 4th student selected from an alphabetical roster of the club

• Students who appear in the first act

• Students with supporting roles

• Students whose names are randomly selected from a hat

_________ 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 a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

Why do we randomly select our samples?

• to control every aspect
• reduce bias
• so we don't get the same answers from everyone
• because it is easier to do

Darrien has 60 actors in his theater class. He concludes that 8 out of 15 actors have previous acting experience. What is the sample size?

• 60

• 8

• 15

• 53

In order to use samples to estimate something from the population, the sample should be _________________ the population.

• exactly the same as
• nothing like
• representative of
• larger than

An entire group of objects - people, animals, plants - from which data can be collected.

• population

• sample

• representative sample

• random sample

When a sample does not accurately represent the population it is a:

• Unbiased sample

• Biased sample

A public library asked every 10th person who entered to name the type of book they were getting.

• Biased

• Unbiased