To determine how citizens feel about the city’s proposed plan to build a second library, researchers surveyed 50 library visitors and found that 42 of them supported the plan and 30 of them would even be open to a tax increase to fund it. Which of the following statements must be true?

To determine how citizens feel about the city’s proposed plan to build a second library, researchers surveyed 50 library visitors and found that 42 of them supported the plan and 30 of them would even be open to a tax increase to fund it. Which of the following statements must be true?

Central High School has gotten large enough that the district plans to create a second high school. When the district sent ballots to all of its students and teachers to choose a mascot for the new school, 20% of students and 80% of teachers voted. Of those who voted, 30% of the students and 70% of the teachers chose Sharks as the mascot, and 50% of students and 20% of teachers chose Bears as the mascot. Which of the following conclusions can properly be drawn from the data above?

Central High School has gotten large enough that the district plans to create a second high school. When the district sent ballots to all of its students and teachers to choose a mascot for the new school, 20% of students and 80% of teachers voted. Of those who voted, 30% of the students and 70% of the teachers chose Sharks as the mascot, and 50% of students and 20% of teachers chose Bears as the mascot. Which of the following conclusions can properly be drawn from the data above?

A marine biologist randomly tagged and measured sharks in the Atlantic Ocean to study their characteristics and habits. The sample included 150 hammerhead sharks, of which 60% measured more than 12 feet in length. Which of the following conclusions is best supported by the data?

A marine biologist randomly tagged and measured sharks in the Atlantic Ocean to study their characteristics and habits. The sample included 150 hammerhead sharks, of which 60% measured more than 12 feet in length. Which of the following conclusions is best supported by the data?

Of the 80 ninth grade students Johanna surveyed at random at her high school, 27.5% of them stated that they prefer year-round school to their current schooling system. If this survey is representative of the 280 students in the ninth grade class, which of the following is closest to the number of students in the class who prefer year-round school?

Of the 80 ninth grade students Johanna surveyed at random at her high school, 27.5% of them stated that they prefer year-round school to their current schooling system. If this survey is representative of the 280 students in the ninth grade class, which of the following is closest to the number of students in the class who prefer year-round school?

The mayor of a city wants to determine whether the city’s citizens would support a small tax increase to expand and renovate the city’s playgrounds. She randomly surveyed 200 parents who live in the city and found that nearly 75% of them would be in favor of the proposal. Which of the following is true of the survey?

The mayor of a city wants to determine whether the city’s citizens would support a small tax increase to expand and renovate the city’s playgrounds. She randomly surveyed 200 parents who live in the city and found that nearly 75% of them would be in favor of the proposal. Which of the following is true of the survey?