Exploring Population, Samples, and Data Statistics

A school conducted a survey of 200 students to find out their favorite subject. What is the population in this scenario?

• All students in the school

• Only the 200 surveyed students

• All teachers in the school

• Students from other schools

In a city of 50,000 residents, a researcher surveys 1,000 people about their commuting habits. Identify the sample and the population.

• Population: 10,000 residents; Sample: 1,000 surveyed people.

• Population: 1,000 surveyed people; Sample: 50,000 residents.

• Population: 50,000 residents; Sample: 1,000 surveyed people.

• Population: 50,000 commuters; Sample: 1,000 people.

A company claims that 70% of its employees are satisfied with their jobs based on a survey of 150 employees. What is the statistic in this case?

• 50% of employees are satisfied with their jobs.

• 60% of employees are satisfied with their jobs.

• 70% of employees are satisfied with their jobs.

• 80% of employees are satisfied with their jobs.

In a study of 500 households, it was found that the average household size is 3. What is the parameter if the average household size for the entire city is known to be 2.8?

• 3.2

• 2.8

• 2.5

• 4.0

A political poll surveys 1,200 voters to predict the outcome of an election in a city of 100,000 voters. What is the parameter in this context?

• The number of voters surveyed in the poll.

• The total number of candidates in the election.

• The true proportion of voters supporting a candidate in the population of 100,000.

• The average age of voters in the city.

A health organization reports that 60% of teenagers in a survey of 300 teens are physically active. What is the statistic and what is the population?

• Statistic: 60% physically active; Population: All teenagers.

• Statistic: 300 teens surveyed; Population: All adults.

• Statistic: 60% inactive; Population: Teenagers in urban areas.

• Statistic: 40% physically active; Population: Only high school students.

A researcher wants to know the average height of all 10th graders in a school district. If they measure the height of 150 students, what is the sample?

• The 150 students measured for height.

• The total number of students in the school district.

• The average height of the 150 students measured.

• All 10th graders in the school district.

In a survey of 250 college students, it was found that 80% prefer online classes. What is the population and what is the statistic?

• Population: students from one specific college; Statistic: 80% of students prefer in-person classes.

• Population: all college students; Statistic: 80% of 250 students prefer online classes.

• Population: only students who prefer online classes; Statistic: 200 students prefer online classes.

• Population: all college students in the country; Statistic: 50% of 250 students prefer online classes.

A wildlife biologist studies a sample of 50 deer in a national park to estimate the average weight of all deer in the park. What is the parameter in this study?

• The average height of all deer in the park.

• The weight of the sample of 50 deer.

• The total number of deer in the park.

• The average weight of all deer in the national park.

A marketing firm surveys 500 customers to determine the average amount spent on groceries. If the average found is $150, what is the statistic and how does it relate to the population?

• The statistic is $150, which estimates the population average spending on groceries.

• The statistic is $500, which represents the total spending of all customers.

• The statistic is $150, indicating the average spending of only 100 customers.

• The statistic is $150, which is the maximum amount spent by a single customer.