Samples and Populations

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

• Biased Sample

• Population

• Unbiased Sample

• Sample

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

• Sample
• Population
• Random Sample
• Quartile

A ____ is a part of a population.

• population

• sample

• median

• party

A school surveys all 7th graders on the soccer team to determine what to sell in the school store. This sample is _________.

• Biased

• Unbiased

• Peanut butter cups

A school survey asked 15 students in band to identify their favorite items on the school cafeteria menu. This sample is ________________.

• Biased

• Unbiased

• Numerical

A student wants to know which type of pizza the students at his high school prefer. Which option would give a unbiased, representative sample:

• Asking all the 10th graders

• Asking 10 random students from each homeroom in the school

A safety inspector conducts air quality tests on a randomly selected group of 7 classrooms at an elementary school. What is the population and what is the sample in this situation?

• The population is all classrooms in the district; the sample is the 7 classrooms selected.

• The population is all classrooms in the elementary school; the sample is the 7 classrooms selected.

• The population is all elementary students in the school; the sample is the students in the 7 classrooms selected.

The TV station wants to get the opinion of viewers on the look of a new game-show set.  The station's staff calls random people in the phone book.  Is this biased or unbiased?

• Biased
• Unbiased

I survey a senior citizen center to gain information about the population of North Eastern, Oklahoma. Which of the following best describes my sample?

• Biased, sample is randomly taken or representative of population.

• Biased, sample is not randomly taken or representative of population.

• Unbiased, sample is randomly taken & representative of population.

• Unbiased, sample is not randomly taken or biased in terms the of population.

I surveyed 100 people at a grocery store by selecting every 3rd person that entered. Does this sample represent the local population?

• Yes, it is random and unbiased.

• Yes, it is random and biased.

• No, while it is random, it is also biased.

• No, while it is random, it is also unbiased.