Random Sampling

A ______ is the entire set of objects from which data might be collected

• sample

• population

• sample statistic

• population characteristic

Tags

CCSS.7.SP.A.1

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

• sample

• population

• sample statistic

• population characteristic

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

True or False:

All samples lead to a good prediction about the entire population.

• True

• False

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

A student wants to know which type of of pizza middle school students prefer. Which of the following options is a good, representative sample of the population?

• Asking all of the 5th graders

• Asking 20 students from each grade level in the middle school

• Asking all of the teachers

• Asking the students who walk to school each day

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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

Tags

CCSS.7.SP.A.1

A beverage company wants to see if people in the United States like their new logo. Which of the following would be the best selection for a sample.

• 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

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Which of the following is NOT a reason why random samples are preferred over surveying the entire population.

• A random sample allows you to survey whoever you are friends with

• Surveying the entire country may cost too much money

• Surveying the entire population may take too much time

• Surveying the entire country may be difficult if everyone does not respond

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

For which of the following situations would you want to collect a sample rather than surveying the entire population?

• The typical number of home runs for a player on the local baseball team

• How many students in our class like mushrooms on pizza

• How many students in our class have more than one pet

• The median price of homes in Ohio

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

A toy store owner wants to know how much kids spend each month on toys. Which choice is the best representation of the population?

• 220 wealthy kids

• All kids who buy toys

• 100 boys between ages 8 to 12

• 125 girls between ages 4 to 10

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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?

• 30 of her friends

• 30 randomly selected students in the school

• 30 students who are often tardy

• 30 students who are often on time

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2