5/20 Stat Quiz (M3)

1. For a class assignment, Tyler will conduct a survey to find out what students like to do after school. He asks the first 10 people he sees in the gymnasium before school what they like to do after school. Which statement correctly explains whether Tyler's sample is a random sample?

• Tyler’s sample is not random because he only asks 10 people

• Tyler’s sample is not random because he asks people in a gymnasium.

• Tyler’s sample is random because he asks the first 10 people he sees.

• Tyler’s sample is random because he asks each person the same question

Andre wants to survey a random sample of the student body in his school to find out which day after school would work best for students to do volunteer work for a local charity. Which

sample would best represent the student body?

• asking twenty students waiting in line for lunch

• asking twenty students on their way to the bus after school

• asking one person from the seventh grade daily for twenty days

• asking one person each from twenty different classrooms during the first class period

Identify the sampling method:

Every fifth person boarding a plane is searched thoroughly.

• SRS

• Stratified

• Cluster

• Systematic

• Voluntary Response

A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

• Biased
• Unbiased

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

• Response Bias
• Undercoverage
• Convenience Sampling
• Voluntary Response

A ___ is a small portion of the population used to gather data from.

• Systematic Sampling Method
• Sample
• Population
• Bias

Frannie and Fiona collect data comparing students' GPA and how many hours per week they spend doing extracurricular activities. This is best described as a(n)

• observational study

• matched pairs design

• experiment

• survey

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34

• 7
• 23
• 31
• 34

What does this symbol represent?

• Standard Deviation

• Variance

• Mean Absolute Deviation

• Sigma