Random Samples and Predictions

Multiple Choice

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

• sample

• population

• sample statistic

• population characteristic

Multiple Choice

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

• sample

• population

• sample statistic

• population characteristic

Multiple Choice

True or False:

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

• True

• False

Multiple Choice

Which statement best describes a random sample of all students in a middle school?

• Of all the students who are on the track team, the first three to finish a race are selected.

• Of all the students who are in the drama club, every third student on the roster is selected.

• Of all the students who complete an assignment, the first, third, and tenth students are selected.

• Of all the students who attend a school-wide assembly, those sitting in every third seat are selected.

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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

Multiple Choice

A school principal wants to see which subject the 695 students in his school liked best. Which choice BEST represents a representative sample?

• All girls in the school

• All students who have an A in Social Studies

• All students who are failing science

• 1 class from each grade level

Multiple Choice

True or False:

You want to see how many students take the bus home from school. You go to the bus stop and ask students how they get home everyday. This is a good, representation of the population.

• True

• False

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Lee will conduct a survey at his school. He will select a random sample of students at the school to take the survey. Which sample is the best random sample for Lee to use?

• every other student in the drama club

• every fifth student who enters the school

• every student who rides the same bus as Lee

• every fourth student in Lee’s homeroom class

Multiple Choice

Eric surveyed 402 employees at the company who worked in Marketing.  Is this a random sample of the employees at the company in general?

• yes

• no

Multiple Choice

Leslie surveyed the 9 youngest students in the elementary school.  Is this sample of the students in the school likely to be representative?

• yes

• no

Multiple Choice

Patrick polled the first 27 people to attend the WMS band concert.  Is this sample of the concert attendees likely to be representative?

• yes

• no