Final answer:
The given numbers could represent either population parameters or sample statistics, depending on whether they refer to the entire population or a sample. The explanation for each number is provided.
Step-by-step explanation:
In each given number, we need to determine whether it represents a population parameter or a sample statistic. Here's an explanation for each:
a. 27% of all residents of the United States older than 25 have a bachelor's degree or higher - This represents a population parameter because it refers to a characteristic of the entire population of residents older than 25 in the United States.
b. 85% of college students polled said they experience stress when they take exams - This represents a sample statistic because it is based on a sample of college students, not the entire population of college students.
c. In a fourth-grade class, more than half the students play musical instruments - This represents a sample statistic because it is based on a sample of students in the fourth-grade class.
d. A recent survey reported that shoppers spend an average of $32 on each trip to the mall - This represents a sample statistic because it is based on a survey of shoppers, not the entire population of shoppers.
e. The median selling price of all homes sold in Atlanta in one recent year was $197,000 - This represents a population parameter because it refers to a characteristic of all homes sold in Atlanta in that specific year.
f. 3% of the runners in the marathon were from outside the United States - This represents a sample statistic because it is based on a sample of runners in the marathon, not the entire population of runners.