Vocab
Representation of Populations
Random Things
Populations and Samples
Biased vs Unbiased(Random)
100
When information is being gathered about a group, entire group of objects, individuals, or events is called...
The Population
100
A city manager wants to know if city residents think the recreation center should have extended hours for teenagers. Determine if the following sample is representative of the entire population: Roll a number cube to select one of the first six names in a list of females in the city, then select every 9th name.
No - it only looks at females.
100
Find the mean of this data set: 1, 4, 5, 6
What is 4
100
A beverage company wanted to see if people in the United States liked their new logo. Which choice best represents a population?
a) People from the western part of the US
b) People form the eastern part of the US
c) Everyone in the US
Everyone in the U.S
100
You want to know which store shoppers at the mall visit the most. You ask each 10th person as they enter the mall which store they will visit.
Random(Unbiased)
200
The part of the population that is chosen to represent the entire group is called...
A Sample
200
A city manager wants to know if city residents think the recreation center should have extended hours for teenagers. Determine if the following sample is representative of the entire population: Spin a spinner with sections labeled 1 through 5 to select one of the first five names in a list of people living alone in the city, then select every 4th name.
No - it only looks at people living alone.
200
What basketball teams are in the final 4?
NC State, Purdue, Alabama, and UConn
200
A musician wanted to see what people who bought his last album thought about the songs. Which choice best represents a sample?
a) A selection of people that like music
b) A selection of people that play in the band.
c) A selection of people who bought the album.
A selection of people who bought the album.
200
Eight citizens are asked their opinions about what trash should be collected.
Biased
300
This is number in the center or middle of a set of data.
The Median
300
A city manager wants to know if city residents think the recreation center should have extended hours for teenagers. Determine if the following sample represents the whole population: Spin a spinner with sections labeled 1 through 5 to select one of the first five names in a list of registered voters in the city, then select every 9th name.
No - this only looks at registered voters.
300
Find the median of this data set: 5, 5, 5, 5, 7, 7, 7, 7
What is 6
300
A gaming website wanted to find out which console its visitors owned. Which choice best represents a population?
a) People who visited GameStop in the month of December
b) All of the website visitors
All of the website visitors.
300
A phone-in survey is taken by a radio station to see how many listeners enjoy jazz in the morning
Biased
400
This is where every member of the population has an equal chance of being selected for the sample.
Random Sample
400
A city manager wants to know if city residents think the recreation center should have extended hours for teenagers. Determine if the following sample represents the whole population: Roll a number cube to select one of the first six names in a list of the city
residents, then select every 15th name.
Yes - all city residents have an opportunity to participate and be represented.
400
13 boxes
400
Before a nation wide election, a polling place was trying to see who would win. Which choice best represents a sample?
a) A selection of voters from Wisconsin
b) A selection of 18 year old voters
c) A selection of voters of all different ages
A selection of voters of different ages
400
Each math class randomly selects two students do represent their class on an advisory panel being assembled by the principal.
Unbiased (Random)
500
This is the type of sample of a population in which all individuals, or instances, were not equally likely to have been selected.
Biased Sample (Not Random)
500
Students who volunteer at an animal shelter make a flyer to encourage students at their school to adopt a pet. They survey a random sample of 25 students in the school’s marching band. They find that 52% do not have any pets in the home. They write this statement on the flyer:
Over half of the students in this school do not have pets! Consider adopting a pet from the Caring Animal Shelter this weekend!
Is the statement misleading? Explain your reasoning.
Yes; Only students from the marching band were
surveyed. For this reason, the animal shelter volunteers should not use this sample to draw conclusions about the entire school.
500
1,800 hawks
500
A toy store owner tracking how much kids spend each month on toys. Which choice best represents a population?
a) All of the kids that go to the grocery store
b) All of the kids that go to the toy store
c) All of the kids that buy toys
All of the kids who buy toys.
500
Each week a teacher randomly selects one student from each class to review homework answers with the rest of the class.
Unbiased (Random)