A quality control manager tests every 100th bottle of juice produced. The factory produces 5,000 bottles daily. What is the population in this context?

All 5,000 bottles produced daily

Which of the following describes a sample?

Every student enrolled at a middle school.

The 300 adults who were called for a phone survey in a city.

All the houses in a particular zip code.

Populations, Samples, and Random Sampling Practice — Grade 7 math

Lesson 1: Populations, Samples, and Random Sampling — Practice Questions

1. A company with 800 employees surveys 75 of them to determine job satisfaction. Which of the following does the group of 75 employees represent?
- A. The population
- B. The sample
- C. The parameter
- D. The data
2. A state's department of motor vehicles wants to study the ages of all 3 million licensed drivers. They analyze the records of 5,000 randomly chosen drivers. The size of the population is ___.
3. A quality control manager tests every 100th bottle of juice produced. The factory produces 5,000 bottles daily. What is the population in this context?
- A. Every 100th bottle tested
- B. All 5,000 bottles produced daily
- C. The quality control manager
- D. The bottles that pass the test
4. To estimate the average weight of pumpkins in a field of 2,000 pumpkins, a farmer weighs a selection of 40 pumpkins. The number of pumpkins in the sample is ___.
5. Which of the following describes a sample?
- A. All the fish in a lake.
- B. Every student enrolled at a middle school.
- C. The 300 adults who were called for a phone survey in a city.
- D. All the houses in a particular zip code.
6. A city planner surveys people at a central train station to ask about their daily commute. Which statement best describes this sampling method?
- A. It is unbiased because it targets commuters.
- B. It is biased because it excludes people who do not use the train.
- C. It is unbiased because the train station is a public place.
- D. It is biased because not everyone lives in the city.
7. A principal wants to find out the favorite school lunch. Which of the following methods is the most unbiased?
- A. Surveying all students in the cafeteria on a Tuesday.
- B. Asking the first 50 students who arrive at school in the morning.
- C. Randomly selecting 75 students from a complete list of all students.
- D. Posting an online poll on the school's social media page.
8. A game developer surveys only players who have played their new game for over 100 hours to gather feedback. This sampling method is ___.
9. A news website posts a poll asking visitors to voluntarily answer a question. Why is this sampling method likely to be biased?
- A. It is unbiased because anyone can respond.
- B. It is biased because only people with strong opinions are likely to respond.
- C. It is unbiased because the website has many visitors.
- D. It is biased because the sample size is too small.
10. A store manager wants to survey customers about their shopping experience. Which of these methods would produce the most representative, unbiased sample?
- A. Surveying customers who are shopping on a Saturday afternoon.
- B. Asking every 10th person who enters the store throughout the week.
- C. Emailing a survey to customers who signed up for the store's rewards program.
- D. Asking customers who are returning an item.