To identify: The population and sample.
To describe: The sample data.
Population: The entire collection of responses from U.S. adults.
Sample: 4,787 adults who responded to a study.
Sample data: 15% of adults use ride-hailing applications and the remaining 85% did not use ride-hailing applications.
A study was conducted on 4,787 adults and found that 15% of the adults were using ride-hailing applications.
A collection of all outcomes, people or measurements of interest are termed as population.
The survey is conducted to study the usage of ride-hailing applications among adults in United States. Thus, the population consists of all U.S. adults.
The information about the population is obtained from the sample. That is, a sample is considered to be a subset of the given population.
The survey is made on 4,787 adults who responded to the survey. This is considered to be a sample because only sub portions from the entire adults were surveyed. Thus, the sample is 4,787 adults.
In the survey of 4,787 adults, 15% were using ride-hailing applications and 85% did not use ride-hailing applications.