Statistics Population Sample Parameter and Statistic

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

• A. Random sample.
• B. Biased sample.

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

• A. Unbiased sample
• B. Biased sample

6. 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?

• A. Thirty randomly selected students from her school
• B. Thirty students who are rarely tardy
• thirty of her friends

14. Biased questions lead people to answer a particular way.

• A. True
• B. False

15. Is the following question biased? 
Are stoplights needed at the intersection of Main and Perry Streets?

• A. Not biased/ Unbiased
• B. Biased

A beverage company wanted to see if people in the United States liked their new logo. Which choice best represents a population?

• A selection of logo artists.

• Every person in the United States.

• A selection of shoppers from different states.

• 3,800 children age 5 - 15

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

• All of the kids who buy toys.

• 227 wealthy kids.

• 228 boys age 7 - 15

• 235 kids from age 10 to 15.

A mayor wanted to see if the people in his town thought he was doing a good job. Which choice best represents a sample?

• 1,000 unemployed voters.

• The mayor's family.

• The residents of the town.

• 242 voters.

A restaurant chain wanted to find out how the customer experience was in a store. Which choice best represents a sample?

• 1 out of every 35 customers

• All of the people who ate at the store.

• 240 customers who spent more than $10.

• 299 customers who filled out complaint cards.

Determine whether you would survey the population or a sample:

You want to know the average height of seventh-graders in Tallahassee.

• Survey the population

• Survey a sample