A Researcher Randomly Selects a Sample of 100 Students from the Students

Multiple Choice

A researcher randomly selects a sample of 100 students from the students enrolled at a particular college. She asks each student his age and calculates the mean age of the 100 students. It is
21.3 years. Based on this sample, she then estimates the mean age of all students enrolled at the College to be 21.3 years. In what way are descriptive statistics involved in this example? In what Way are inferential statistics involved?

A) When calculating the mean age of the students in the sample, the researcher is using descriptive statistics. When estimating the mean age of all students at the college, the Researcher is using inferential statistics.
B) When calculating the mean age of the students in the sample, the researcher is using inferential statistics. When estimating the mean age of all students at the college, the Researcher is using descriptive statistics.