random sampling

Are the conclusions from this survey likely to be valid or invalid?

• Valid
• Invalid
• I don't know

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 students who are often tardy

• Thirty students who are rarely tardy

• Thirty of her friends

• Thirty randomly selected students from her school

A _______ is a subset or part of the population that you can collect data from.

• sample

• population

• sample statistic

• population characteristic

To determine how often people eat out, every tenth person entering a Mexican restaurant is surveyed.

• Unbiased Sample

• Biased Sample

1.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team. What type of sample would this be?

• Biased
• Unbiased

A newspaper randomly chooses 100 names from its subscriber list and then surveys those subscribers to find out if they read the sports section. This sample is ........

• unbiased

• biased

What is the difference between the highest score and the lowest score on the test?

• 15
• 100
• 6
• 10

A school district wants to know if parents would prefer to get phone calls or emails from the schools. They survey the parents of all the seventh grade students enrolled in the district. Is this a biased sample or unbiased sample?

• Biased Sample

• Unbiased Sample

A beverage company wants to see if people in the United States like their new logo. Which of the following represents the population?

• 2,000 middle school students

• A selection of logo designers

• A selection of shoppers from different states

• All of the people in the United States

Biased or Random?

Isaac wants to find out the favorite foods of students at King HS. He asks the boys’ basketball team about their favorite foods.

• Biased sample

• Random sample