Population and Sample

The manager of a book store surveys people who buy mystery novels to see if the store should expand its hours. What is the population?

• People who visit the bookstore.

• People who buy mystery novels.

• People who read books in general.

• People who work at the bookstore.

The entire group studied.

• Population

• Sample

• Subset

• Demographic

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

• Sample

• Population

• Subset

• Demographic

What would be the population in this example? Surveyors in a mall choose shoppers to ask about products they prefer.

• all shoppers in the mall

• only the shoppers surveyed

• shoppers who prefer a specific product

• shoppers who visit the mall on weekends

Why is it important to have a random sample in a survey?

• To reduce bias and ensure the sample represents the population

• To increase the sample size for better accuracy

• To make the survey easier to conduct

• To ensure that all demographics are included in the survey

What is the term for a sample that accurately reflects the characteristics of the population?

• Representative Sample

• Random Sample

• Biased Sample

• Convenience Sample

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

• The sample didn't include students.

• The teachers may not know the students' preferences.

• The sample size is too small to be representative.

• The teachers might have different opinions on juice.

What would be the sample in this example? Surveyors in a mall choose shoppers to ask about products they prefer.

• the shoppers who were asked their preferences

• all shoppers in the mall

• the surveyors conducting the survey

• the products available in the mall

Identify the Sample: A restaurant wants to know if customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.

• 15 customers

• 20 customers

• 25 customers

• 30 customers

Identify the Sample: A company surveys 100 employees to find out their job satisfaction levels.

• The 100 employees surveyed.

• The management team of the company.

• All employees in the company.

• The customers of the company.