(S) 4/8 Representative Samples Practice (S)

Last updated over 1 year ago

20 questions

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Library

(S) 4/8 Representative Samples Practice (S)

Last updated over 1 year ago

20 questions

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

1

Required

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 Mr. Roy surveyed 60 students to find out their favorite day of the school week.  The results are shown in the table. 

 Identify percentage of the sample preferred Hawaiian Shirt Monday? _______ 
 If there are 550 students in the school, predict how many enjoy Hawaiian Shirt Monday the most. _______ 

1

You ask 125 randomly chosen students to name their favorite food. There are 1500 students in the school. Predict the number of students in the school whose favorite food is pizza.

1

The table shows the results of a survey of 75 seventh grade students at Coleman Middle School. Coleman Middle has a total of 250 seventh grade students. 
TRUE OR FALSE: Based on the data in the table, we can predict that approximately 158 of the 7th graders’ preferred vacation activity was playing video games. _______ 

If false, what is the correct prediction? _______ (Write 0 if the statement above is true)

1

Manny wants to order T-shirts for his high school, which consists of about 5,000 students. He takes a random sample to figure out how many sizes to order of each kind. If he randomly surveyed 100 students and 34 of them wanted a size small, how many small T-shirts should Manny order?

1

Data was collected from a random sample of 50 students regarding their favorite candidate running for student council president. If you were to randomly select 10 students, what number would you predict would select candidate A? Round to the nearest whole number!

Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

Biased

Unbiased

A public library asked every 10th person who entered to name the type of book they were getting

Biased, Convenience Sample

Unbiased, Systematic Random Sample

Unbiased, Simple random

Biased, Voluntary Response

A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

Biased, Convenience Sample

Unbiased, Systematic Random Sample

Unbiased, Simple random

Biased, Voluntary Response

A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

Biased

Unbiased

To see who has a computer at home the front office chooses 10 students randomly per grade to ask

Biased

Unbiased

The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.

Biased

Unbiased

A senator wants to see how she's doing. She sends a survey to 1000 registered voters in her party

Biased

Unbiased

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?

thirty students who are often tardy

thirty students who are rarely tardy

thirty of her friends

thirty randomly selected students from her school

Marcos wants to find out how many students at his school like to go to the movies. Which survey method is likely to produce a representative survey?

Ask the boys in the boys locker room.

Ask students coming out of a movie theater.

Ask every 5th student who enters the cafeteria

Ask half of the 34 students on the soccer team.

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. Identify the sample.

20 customers

8 customers

All customers

Dessert

After ordering some shoes on amazon.com, amazon asks consumers to take a survey. What sampling method is amazon using?

Simple Random

Voluntary Response

Systematic Random

Convenience Sample

A sample should be

representative of  only middle school students only

a very large group

representative of the population

representative of people who volunteer

Which sample methods yield valid results?

Simple Random and Systematic Random Samples

Simple Random and Convenience Sample

Systematic Random and Voluntary Response

Voluntary Response and Convenience Sample

A restaurant owner leaves comment cards on all of the tables and encourages customers to participate in a survey to assess their overall experience in his restaurant. Is this an example of a valid or invalid sample? Why?

Valid because participants are able to randomly complete the survey. Samples choosen at random are usually representative of the population.

Invalid because this is an example of a voluntary survey. This type of sample is often biased due to customers that might have an extremely good or bad experience.

 Mr. Roy surveyed 60 students to find out their favorite day of the school week.  The results are shown in the table. 

 Identify percentage of the sample preferred Hawaiian Shirt Monday? _______ 
 If there are 550 students in the school, predict how many enjoy Hawaiian Shirt Monday the most. _______ 

You ask 125 randomly chosen students to name their favorite food. There are 1500 students in the school. Predict the number of students in the school whose favorite food is pizza.

The table shows the results of a survey of 75 seventh grade students at Coleman Middle School. Coleman Middle has a total of 250 seventh grade students. 
TRUE OR FALSE: Based on the data in the table, we can predict that approximately 158 of the 7th graders’ preferred vacation activity was playing video games. _______ 

If false, what is the correct prediction? _______ (Write 0 if the statement above is true)

The table shows the results of a survey of 75 seventh grade students at Coleman Middle School. Coleman Middle has a total of 250 seventh grade students.
Since going to an amusement park represents 32% of the students in the survey, then we can predict about 32% of all 7th graders would also select going to an amusement park.

True

False

Manny wants to order T-shirts for his high school, which consists of about 5,000 students. He takes a random sample to figure out how many sizes to order of each kind. If he randomly surveyed 100 students and 34 of them wanted a size small, how many small T-shirts should Manny order?

Data was collected from a random sample of 50 students regarding their favorite candidate running for student council president. If you were to randomly select 10 students, what number would you predict would select candidate A? Round to the nearest whole number!

Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

Biased

Unbiased

A public library asked every 10th person who entered to name the type of book they were getting

Biased, Convenience Sample

Unbiased, Systematic Random Sample

Unbiased, Simple random

Biased, Voluntary Response

A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

Biased, Convenience Sample

Unbiased, Systematic Random Sample

Unbiased, Simple random

Biased, Voluntary Response

A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

Biased

Unbiased

To see who has a computer at home the front office chooses 10 students randomly per grade to ask

Biased

Unbiased

The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.

Biased

Unbiased

A senator wants to see how she's doing. She sends a survey to 1000 registered voters in her party

Biased

Unbiased

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?

thirty students who are often tardy

thirty students who are rarely tardy

thirty of her friends

thirty randomly selected students from her school

Marcos wants to find out how many students at his school like to go to the movies. Which survey method is likely to produce a representative survey?

Ask the boys in the boys locker room.

Ask students coming out of a movie theater.

Ask every 5th student who enters the cafeteria

Ask half of the 34 students on the soccer team.

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. Identify the sample.

20 customers

8 customers

All customers

Dessert

After ordering some shoes on amazon.com, amazon asks consumers to take a survey. What sampling method is amazon using?

Simple Random

Voluntary Response

Systematic Random

Convenience Sample

A sample should be

representative of  only middle school students only

a very large group

representative of the population

representative of people who volunteer

Which sample methods yield valid results?

Simple Random and Systematic Random Samples

Simple Random and Convenience Sample

Systematic Random and Voluntary Response

Voluntary Response and Convenience Sample

A restaurant owner leaves comment cards on all of the tables and encourages customers to participate in a survey to assess their overall experience in his restaurant. Is this an example of a valid or invalid sample? Why?

Valid because participants are able to randomly complete the survey. Samples choosen at random are usually representative of the population.

Invalid because this is an example of a voluntary survey. This type of sample is often biased due to customers that might have an extremely good or bad experience.

The table shows the results of a survey of 75 seventh grade students at Coleman Middle School. Coleman Middle has a total of 250 seventh grade students. 
Since going to an amusement park represents 32% of the students in the survey, then we can predict about 32% of all 7th graders would also select going to an amusement park.

True

False