### All Common Core: 7th Grade Math Resources

## Example Questions

### Example Question #1 : Statistics & Probability

A cable company wanted to find out what brand of TVs their customers use. Select the option that best represents a population.

**Possible Answers:**

The entire population in Florida

All of the cable company's customers

A random sample of the cable company's customers

The entire population in the United States

**Correct answer:**

All of the cable company's customers

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied, in this case all of the customers of the cable company.

"The entire population in the United States" and "The entire population in Florida" are not the correct answer because not everyone in an entire population uses the same cable company, and this company is only concerned about their own customers. Also, a random sample does not represent a population, so that is not the correct answer.

### Example Question #2 : Statistics & Probability

A cell phone company wanted to find out what brand of phones their customers use. Select the option that best represents a population.

**Possible Answers:**

The entire population in the United States

All of the cell phone company's customers

The entire population in Texas

A random sample of the cell phone company's customers

**Correct answer:**

All of the cell phone company's customers

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied, in this case all of the customers of the cell phone company.

"The entire population in the United States" and "The entire population in Texas" are not the correct answer because not everyone in an entire population uses the same cell phone company, and this company is only concerned about their own customers. Also, a random sample does not represent a population, so that is not the correct answer.

### Example Question #1 : Statistics & Probability

A chip company wants to see if the people in Ohio like their new flavor of chips. Select the option that best represents a population.

**Possible Answers:**

Children in Ohio

Adults in Ohio

Every person in the United States

Every person in Ohio

**Correct answer:**

Every person in Ohio

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied. In this case, people of Ohio.

Because the chip company is only concerned about what the people in Ohio thinks of their new chip flavor, we can eliminate the option for everyone in the United States, because we are focused on only one state. Also, a population includes both adults and children, which is why "Every person in Ohio" is the best answer choice.

### Example Question #2 : Statistics & Probability

After a movie was shown in theaters, a director wanted to know what the people who saw his movie thought about the movie's ending. Select the option that best represents a sample.

**Possible Answers:**

All the boys who saw the movie

Every person in the United States old enough to see the movie

A random selection of people who saw the movie

Every person who saw the movie

**Correct answer:**

A random selection of people who saw the movie

In order to answer this question we first need to know what "sample" means. A sample is a subset of a population.

Because we want a subset, we don't want the entire population, which eliminates the answer choices "Every person who saw the movie" and "Every person in the United States old enough to see the movie". The question did not specify if the director wanted just the boys' opinions, which makes "A random selection of people who saw the movie" the best answer choice.

### Example Question #3 : Statistics & Probability

A barbecue company wants to see if the people in Washington like their new flavor of barbecue. Select the option that best represents a population.

**Possible Answers:**

Every person in the United States

Children in Washington

Every person in Washington

Adults in Washington

**Correct answer:**

Every person in Washington

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied. In this case, people of Washington.

Because the barbecue company is only concerned about what the people in Washington thinks of their new barbecue flavor, we can eliminate the option for everyone in the United States, because we are focused on only one state. Also, a population includes both adults and children, which is why "Every person in Washington" is the best answer choice.

### Example Question #4 : Statistics & Probability

A company that produces eye glasses for children in the United States wants to see if kids like their new style of glasses. Select the option that best represents a population.

**Possible Answers:**

Everyone in the United States

Everyone in Florida

Every adult in the United States

Every child in the United States

**Correct answer:**

Every child in the United States

In order to answer this question, we first need to know what "population" means. A population is the entire group that is being studied. In this case, it's all of the kids in the United States.

Because the eye glasses company is only concerned about what kids think of their new style, we can eliminate all of the options that say "everyone" or "every adult", leaving us with "Every child in the United states" as our correct answer.

### Example Question #7 : Statistics & Probability

A grocery store wanted to find out what brand of chips their customers buy most often. Select the option that best represents a population.

**Possible Answers:**

All of the grocery store's customers

A random sample of the grocery store's customers

The entire population in the United States

The entire population in California

**Correct answer:**

All of the grocery store's customers

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied, in this case all of the customers the shop at the grocery store.

"The entire population in the United States" and "The entire population in California" are not the correct answer because not everyone in an entire population shops at the same grocery store, and this store is only concerned about their own customers. Also, a random sample does not represent a population, so that is not the correct answer.

### Example Question #8 : Statistics & Probability

A clothing store wanted to find out what accessories their customers buy most often. Select the option that best represents a population.

**Possible Answers:**

All of the clothing store's customers

A random sample of the clothing store's customers

The entire population in Indiana

The entire population in the United States

**Correct answer:**

All of the clothing store's customers

In order to answer this question we first need to know what "population" means. A population is the entire group that is being studied, in this case all of the customers the shop at the clothing store.

"The entire population in the United States" and "The entire population in Indiana" are not the correct answer because not everyone in an entire population shops at the same clothing store, and this store is only concerned about their own customers. Also, a random sample does not represent a population, so that is not the correct answer.

### Example Question #5 : Statistics & Probability

After a school debate by the students running for student council, the principal wanted to know what the student body thought about the topics that were debated. Select the option that best represents a sample.

**Possible Answers:**

A random selection of the students who were at the debate

Everyone who was at the debate

The girls that attend the school

All of the teachers

**Correct answer:**

A random selection of the students who were at the debate

In order to answer this question we first need to know what "sample" means. A sample is a subset of a population.

Because we want a subset, we don't want the entire population, which eliminates the answer choices "Everyone who was at the debate ". Also, the principal wants to know what the student body thought about the topics debated, not the teachers, which eliminates "All of the teachers". Finally, the principal didn't specify if she wanted just the girls' opinions, which makes "A random sample of the students who were at the debate" the best answer choice.

### Example Question #10 : Statistics & Probability

After a school choir concert, the music teacher wanted to know what the student body thought about the song choices. Select the option that best represents a sample.

**Possible Answers:**

All of the teachers

The girls that attend the school

A random selection of the students who were at the concert

Everyone who was at the choir concert

**Correct answer:**

A random selection of the students who were at the concert

In order to answer this question we first need to know what "sample" means. A sample is a subset of a population.

Because we want a subset, we don't want the entire population, which eliminates the answer choice "Everyone who was at the choir concert ". Also, the teacher wants to know what the student body thought about the songs, not the teachers, which eliminates "All of the teachers". Finally, the music teacher didn't specify if she wanted just the girls' opinions, which makes "A random sample of the students who were at the concert" the best answer choice.