A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

The sample didn't include students.

The sample can only be accurate if each teacher is included in the sample

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

to randomly choose some 7th grade students to select a location

to randomly ask 8th grade students who went on a field trip last year

to ask all 7th grade teachers and administrators for a location

to ask the student council to choose a location

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

The students will be selected from the choir

The students will be selected randomly throughout the school

The students will be selected on Wednesday afternoon before the choir concert

The choir director will select five students from each of the forty homerooms in the school

Which scenario would produce the least biased results?

asking athletes at a gym what their favorite television show is

asking shoppers at a store where their favorite place to shop is

asking fans at a baseball game who their favorite baseball team is

asking students in a college library what their favorite college sports team is

A state fair had 1,019,887 people in attendance. The fair committee performed a survey. The question was, “What do fairgoers enjoy most about the fair?” Of those who responded, 83% reported eating traditional foods. Which group of people represents the sample group?

Fair goers who responded to the survey

Fair goers who like traditional foods

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 randomly selected students from her school

thirty students who are often tardy

thirty students who are rarely tardy

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 25 students in his homeroom class.

Ask the boys in the boys locker room.

Ask students coming out of a movie theater.

Ask half of the 34 students on the soccer team.

A radio station in Raleigh, NC wants to know the most popular song of the week. The DJ surveys random listeners who call in throughout the week. What is the population of the DJ’s survey?

listeners of this radio station

the listeners who call the station

the most popular song of the week

Mrs. Croix is conducting a survey to find out the favorite snack of fifth and sixth graders. She will ask a sample of 100 students. Which of the groups below should be surveyed to get the BEST representative sample?

20 students from each of the 5 local fifth- and sixth-grade schools

100 students at the movie theater

the first 100 students who go to a local baseball game

5 students from each of the 20 local elementary schools

A factory manufactures light bulbs. The factory currently has 300 boxes of light bulbs in its warehouse. To test the quality of bulbs, Alex decides to take out a sample of bulbs and test them to see if they work. Which surveying method will give him the least valid results?

selecting one box randomly and then selecting all the bulbs from the box

selecting ten boxes randomly, mixing the bulbs of these boxes together and then selecting ten bulbs randomly

selecting ten boxes randomly and then selecting one bulb randomly from each box

selecting one bulb randomly from every tenth box

Anthony opened a new store and wants to conduct a survey to determine the best store hours. Which is the best representative sample?

A group of randomly selected people who come to the store in one week.

A group of randomly selected people who visit his website on one night.

Every person he meets at his health club one night.

The first 20 people who walk into his store one day.

Becky wants to know if she should sell cranberry muffins at her bakery. She asks every customer who buys blueberry muffins if they would buy cranberry muffins. Is this a representative sample?

No, it does not include people who would buy cranberry muffins but do not like blueberry muffins

Yes, it does not include people who would buy cranberry muffins but do not like blueberry muffins

Yes, it does include people who would buy cranberry muffins but do not like blueberry muffins

No, it does include people who would buy cranberry muffins but do not like blueberry muffins

Simon wants to find out which shop has the best frozen fruit drink in town. How could Simon conduct a survey with a sample that is representative of the population?

Simon could stand outside a popular store in town that does not sell frozen fruit drinks and survey every fifth customer about their favorite local favorite fruit drink shop.

Simon could stand outside a popular store in town that does sell frozen fruit drinks and survey every fifth customer about their favorite local favorite fruit drink shop.

There are 400 students at Polly's school. She surveyed a random sample of 80 students to find their favorite hobby. 19 said they like to read. 30 said they like to be with friends. 8 said they like to do crafts. 23 said they like to play sports. Polly infers that doing crafts is the least popular hobby at her school. Refer to the data table. Polly surveys two more samples. Do the results from these samples support the inference made from the first sample?

Yes, the survey results support the inference that doing crafts is the least popular hobby at Polly's school.

No, the survey results does not support the inference that doing crafts is the least popular hobby at Polly's school.

There are 400 students at Polly's school. She surveyed a random sample of 80 students to find their favorite hobby. 19 said they like to read. 30 said they like to be with friends. 8 said they like to do crafts. 23 said they like to play sports. Polly infers that doing crafts is the least popular hobby at her school. Yovani estimates that about 200 students in the school favor playing sports as a hobby. Do you agree?

No, I used a proportion to find the number of students in the school who likely to prefer to play sports. 23/80 = 115/400; 115 students

Yes, I used a proportion to find the number of students in the school who likely to prefer to play sports. 23/80 = 200/400; 200 students

The dot plots show how long it took students in Mr. Chauncey's two science classes to finish their science homework last night. Find the means to make an inference about the data.

The 1st period mean is 38.75. The 2nd period mean is 35. On average, it took students in the 1st period class slightly longer to finish their homework than it did the students in the 2nd period class.

The 1st period mean is 35. The 2nd period mean is 38.75. On average, it took students in the 1st period class slightly longer to finish their homework than it did the students in the 2nd period class.

The 1st period mean is 35. The 2nd period mean is 38.75. On average, it took students in the 2nd period class slightly longer to finish their homework than it did the students in the 1st period class.

The 1st period mean is 38.75. The 2nd period mean is 35. On average, it took students in the 2nd period class slightly longer to finish their homework than it did the students in the 1st period class.

An environmental advocacy group wants to know how residents intend to vote on a proposal to reduce bus service to certain neighborhoods in the city. They decide to conduct a survey. Which describes a representative sample of the population for the situation?

a randomly selected group of residents from the city’s voter registration records

a randomly selected group of members at a local gardening club

a randomly selected group of workers at a factory that employs a large percentage of the city

a randomly selected group of residents in the neighborhoods affected by the proposal

The counselors at a camp are scheduling activities for family visitation day. They decide to conduct a survey to determine which activities campers would most like to share with their families. Which describes a method for getting a sample that is both representative and random?

During morning roll call, ask every tenth camper to complete a survey.

During the dinner hour, announce that any camper interested in doing so can collect and complete a survey.

During camp free time, ask every fifth camper in the arts and crafts hall to complete a survey.

During camp free time, ask all campers down at the lake to complete a survey.

A student wants to know which type of pizza the students at his high school prefer. Which option would give a unbiased, representative sample:

Asking 10 random students from each homeroom.

Asking all the students in the hot lunch line.

Asking every other student who gets off a school bus.

Select all the reasons why random samples are preferred over other methods of getting a sample.

A random sample is likely to give you a sample that is representative of the population.

A random sample is a fair way to select a sample, because each person in the population has an equal chance of being selected.

If you select a random sample, you can determine how many people you want in the sample.

A random sample is always the easiest way to select a sample from a population.

A scientist studies a herd of deer at a local state park to learn about their dietary habits. Identify the population .

The herd of deer at the local state park

All animals at the park other than deer

KB QUIZ-Random samples and populations

Authored by Smriti Bhowmik

Mathematics

6th - 7th Grade

CCSS covered

Used 3+ times

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100 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

_______ is a part of a group being surveyed.

Sample

Population

Random Sample

Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

_________ is a sample in which each individual or object in the entire population has na equal chance of being selected.

Sample

Population

Random Sample

Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

CCSS.7.SP.B.4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

_______ is the entire group of objects or individuals considered for a survey.

Sample

Population

Random Sample

Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A student surveys mathematics teachers to get their opinion on teaching. What is the sample?

All teachers in the world.

All teachers within the school.

All mathematics teachers in the school.

All teachers except mathematics teachers.

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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.

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A computer manufacturer surveys its customers who purchased laptop computers to ask what software the company should include with its computer. Identify the population.

Customers who purchased laptop computers.

Customers of the store.

Customers who are interested in software.

Computer manufacturers

Tags

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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KB QUIZ-Random samples and populations

_______ is a part of a group being surveyed.

_________ is a sample in which each individual or object in the entire population has na equal chance of being selected.

_______ is the entire group of objects or individuals considered for a survey.

A student surveys mathematics teachers to get their opinion on teaching. What is the sample?

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?

A computer manufacturer surveys its customers who purchased laptop computers to ask what software the company should include with its computer. Identify the population.

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.

A scientist studies a herd of mule deer to learn about their dietary habits. Identify the population.

A new cable TV station wants to study the viewing habits of households. The station surveys every household that purchased a new TV within the last 2 years in New York. Is this random sampling?

A U.S. senator from Maine wants to find out the opinion of the voters in his state on issues concerning education. The office of the senator sends out a survey to a random sample of registered voters in Maine. Is this random sampling?

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