(A) 3/26 Biased and Unbiased Samples (A)
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Last updated about 1 year ago
21 questions
1
Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
1
A public library asked every 10th person who entered to name the type of book they were getting
A public library asked every 10th person who entered to name the type of book they were getting
1
A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
1
A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.
A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.
1
To see who has a computer at home the front office chooses 10 students randomly per grade to ask
To see who has a computer at home the front office chooses 10 students randomly per grade to ask
1
The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.
The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.
1
A senator wants to how she is doing. She sends a survey to 1000 registered voters in her party
A senator wants to how she is doing. She sends a survey to 1000 registered voters in her party
1
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?
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?
1
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?
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?
1
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.
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.
1
After ordering some shoes on amazon.com, amazon asks consumers to take a survey. What sampling method is amazon using?
After ordering some shoes on amazon.com, amazon asks consumers to take a survey. What sampling method is amazon using?
1
A sample should be
A sample should be
1
All 7th graders' names are put into a hat. 30 are randomly drawn to receive free ice-cream. Which sample method is used?
All 7th graders' names are put into a hat. 30 are randomly drawn to receive free ice-cream. Which sample method is used?
1
Which sample methods yield valid results?
Which sample methods yield valid results?
1
Apple has a team that randomly inspects iPhones as they are manufactured. The team inspects every 25th phone that is produced. This is an example of what time of sample?
Apple has a team that randomly inspects iPhones as they are manufactured. The team inspects every 25th phone that is produced. This is an example of what time of sample?
1
Evelyn wants to know what sport students at NGMS prefer. Students at NGMS is the population, but she surveys a sample of students. She collects data from her 7th grade homeroom one morning. Is this sample biased or unbiased? Why?
Evelyn wants to know what sport students at NGMS prefer. Students at NGMS is the population, but she surveys a sample of students. She collects data from her 7th grade homeroom one morning. Is this sample biased or unbiased? Why?
1
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?
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?
1
Each 7th grade teacher likes to give their students and equal opportunity to participate in class. In order to be fair they put the names of students in each class in buckets labeled Academic 1, Academic 2, Academic 3 and Academic 4. Each teacher random pulls a name from the bucket to select a student to answer questions during class. This is an example of which type of survey/selection process?
Each 7th grade teacher likes to give their students and equal opportunity to participate in class. In order to be fair they put the names of students in each class in buckets labeled Academic 1, Academic 2, Academic 3 and Academic 4. Each teacher random pulls a name from the bucket to select a student to answer questions during class. This is an example of which type of survey/selection process?
1
Dylan wants to determine the most popular music group or artist among Gwinnett County Middle School students. Which of the following samples will give him the most accurate results?
Dylan wants to determine the most popular music group or artist among Gwinnett County Middle School students. Which of the following samples will give him the most accurate results?
1
Oranges from an orchard need to be sampled to see if they are sweet enough for juice. The orchard has 25,000 orange trees. Each tree has at least 500 oranges. Claire decides to randomly choose 800 trees and test one orange from each tree. Is this sample representative? Why or why not?
Oranges from an orchard need to be sampled to see if they are sweet enough for juice. The orchard has 25,000 orange trees. Each tree has at least 500 oranges. Claire decides to randomly choose 800 trees and test one orange from each tree. Is this sample representative? Why or why not?
1
A clothing company wants to know what color leggings teenagers will buy. The company decides to spend one day in the junior departments of five randomly selected stores in randomly selected cities and ask every teenager who enters what color leggings they buy. Is this survey biased or unbiased? Why or why not?
A clothing company wants to know what color leggings teenagers will buy. The company decides to spend one day in the junior departments of five randomly selected stores in randomly selected cities and ask every teenager who enters what color leggings they buy. Is this survey biased or unbiased? Why or why not?