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.

Sampling Practice — Grade 7 math

Lesson 3: 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 double dot plot compares fish lengths from Pond A and Pond B. The data for Pond A is clustered from 5-9 cm, while Pond B's data is clustered from 12-16 cm. What does the minimal overlap suggest?
- A. The ponds have a similar fish population.
- B. There is a significant difference between the fish sizes in the ponds.
- C. The median fish length is the same for both ponds.
- D. Pond A has a greater spread of fish lengths than Pond B.
7. A double dot plot shows points scored by two players. Player 1's scores are tightly clustered around 20. Player 2's scores are spread from 10 to 30, centered around 24. Which statement is true?
- A. Player 1 has a higher center and greater variability.
- B. Player 2 has a higher center and greater variability.
- C. Player 1 has a higher center and less variability.
- D. Player 2 has a lower center and greater variability.
8. A double dot plot shows the heights of two types of plants. Type X plants have heights from 8 to 15 inches. Type Y plants have heights from 12 to 19 inches. The overall range for both is 8 to ___ inches.
9. What is the primary purpose of constructing a double dot plot on a single number line?
- A. To calculate the average of each dataset more easily.
- B. To fit more data onto a single graph.
- C. To directly compare the distribution, center, and spread of two populations.
- D. To show data for one population over two different time periods.
10. A double dot plot shows weekly hours worked at Store A and Store B. Store A's hours are clustered from 15-25. Store B's are from 30-40. An employee who worked 22 hours most likely works at which store?
- A. Store A
- B. Store B
- C. Either store is equally likely
- D. Cannot be determined from the information