Worksheets3/6 Quiz Review HW - Representative Samples & Inferences
Total questions: 40
Worksheet time: 1hrs 4mins
Surveyors in a mall choose shoppers to ask about products they prefer.
The manager of a book store surveys people who buy mystery novels to see if the store should expand its hours.
What is the population?
People who visit the bookstore.
People who buy mystery novels.
Residents of the town
People who like to read.
A music store gives comment cards to all members of its Jazz Club to find out about satisfaction with the club's features.
Identify the sample.
People who play instruments.
All music store customers except Jazz Club members.
All music store customers
Jazz Club members
Population or Sample?
A factory overseer selects 40 threaded rods at random from those produced that week at the factory, then she tests their tensile strength.
Population
Sample
Population or Sample?
A police officer measures the speed of all the cars that pass a specific point on the road during his shift.
Population
Sample
Identify the Population:
Cherokee County Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective. What is the population in this situation?
230 Teachers
All Cherokee County teachers
All Cedar Bluff teachers
All Sand Rock and Spring Garden students
The Magic Kingdom theme park has many attractions, one of which is Space Mountain. Are the people who ride Space Mountain the population or a sample of the theme park? Explain.
Population. They are all the people at the theme park.
Sample. They are a subset of all the people at the theme park.
Both population and sample. They are all the people at the theme park
Neither population nor sample. They are not the people at the theme park.
During a middle school baseball game, every spectator placed his or her ticket stub into a container. After the game, the coach chose eight people to march in the sportsmanship parade. What is the sample in this situation?
The coach
The ticket stubs
The eight people to march in the sportsmanship parade
The baseball game spectators
Identify the population and sample in the following survey:
A telephone survey is given to 2,000 randomly selected families in order to predict the average amount of money American families spend on groceries each week.
Which is the SAMPLE (the part)
AMERICA
2000 FAMILIES
Identify the population and sample in the following survey:
To determine the number of students who carry backpacks in school, Tina collects data on the first 100 students who enter the building.
Which is the POPULATION
students
first 100 students
Identify the Sample:
The Huddle House wants to know if their 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 manager at Huddle House concluded that most customers do not order dessert. What is the SAMPLE in this scenario?
20 customers from Huddle House
All customers from Huddle House that evening
8 customers from Huddle House
The employees from Huddle House
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 people ages 5-13
A selection of logo artists
A selection of shoppers from different states
all the people in the United States
A survey company was trying to see if people in a state thought the pollution was too high. Which choice BEST represents the population to be surveyed?
a selection of people who live in small towns
a selection of people who live in clean neighborhoods
a selection of people from each city in the state
all the people in the state
A (a) is a part of a group being surveyed.
Lucy collects data from a random sample of seventh-graders. Out of 40 respondents, 7 attend after-school programs. Of the 200 seventh-graders attending Lucy’s school, how many would be expected to attend afterschool programs?
(a)
Tricia surveys students in her computer class about time spent on computers by students in her school. Is this a representative sample? Explain.
No; Only a few students in the school take computer class.
No; Students in computer class likely use computer more than other students.
Yes; Students in computer class are representative of the school.
Yes; Students in computer class are representative of people in the town.
The manager of the zoo would like to survey its visitors to determine their favorite exhibit. Which sample below would be unbiased?
20 random people in the food court
Every 10th person who enters the zoo
50 random people at the tiger exhibit
3 people who are buying souvenirs
To determine their favorite country artist, a radio station randomly surveyed 100 people at a Luke Bryan concert. Determine whether this sample is biased or unbiased.
Biased
Unbiased
The cafeteria manager at a local middle school would like to survey students to get their opinion on the new lunch menu. Which of the following sampling methods would be unbiased?
Select one class at random, then survey each student in that class.
Obtain an alphabetical list of all students that attend the school, then survey every 10th
student.
Have each eighth grader complete a survey during homeroom.
Randomly survey 10 students in the cafeteria.
A high school is conducting a survey to see how many students have part-time jobs. Which sample below would be unbiased?
every 10th
student that
enters a school football
game
100 random students in the
school parking lot
five random students in
each homeroom
50 students from the band and chorus
To determine how much money college students spend on clothes each semester,a researcher surveys 450 college students as they leave the university library. Is this sample biased or unbiased?
Biased because not everyone goes to the library
Unbiased because 450 people is enough people to provide accurate data
Biased because 450 is not enough people to provide accurate data
Unbiased because everyone goes to the library
To determine the quality of service customers receive, an airline sends an e-mail survey to each customer after the completion of a flight. Will this sample be biased or unbiased?
Unbiased because each customer receives an email.
Unbiased because the survey will get many responses.
Biased because the survey will not get enough responses.
Biased because not every person reads their email.
You want to estimate the number of students in a high school who ride the school bus. Which sample is best?
4 students in the hallway
All students in the marching band
50 seniors at random
100 students at random during lunch
Are the residents of Florida the sample or the population?
sample
population
Are all quarters in circulation the sample or the population?
Sample
Population
Which one is the population?
5 ants
Colony of ants
Which one is the sample?
All books in library
10 library books
Which one is the sample?
Passengers on a train
Passengers in the first train car
Which one is the population?
DVDs in a video store
DVDs in the comedy section
Choose the best sample.
Sample A
Sample B
Choose the best sample.
Sample A
Sample B
Which of the following is NOT needed in order to be considered an unbiased sample?
Selected at random
Representative of the entire population (everyone has a chance of being chosen)
Representative of at least half of the population
Large enough to provide accurate data
If there are 1,000 students in your high school and 40 out of 80 students surveyed said they had a part-time job, how many out the 1,000 students would you predict to have a part-time job?
400
80
40
500
You are doing a survey to find out if Knoxville, TN should be the home of a new NBA team and they asked UT college boys basketball players. Biased or unbiased?
Unbiased
Biased
You are doing a survey to find out what kids really think about school lunch and you stand outside a lunchroom and ask every 5th person from every grade. Biased or unbiased?
Biased
Unbiased
You are doing a survey to find out what sport high schoolers like the most, and you ask people from a Rugby team. Biased or unbiased?
Biased
Unbiased
A principal randomly chooses 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students?
27
9
18
80
