Final answer:
The categories 'Freshman' and 'First year student' represent demographic categorical data in college settings. When a statistics professor collects such information and represents it in a pie chart, it displays the proportions of categories within a student population. Graduating college students without a job who then seek employment are classified as frictionally unemployed.
Step-by-step explanation:
The categories of "Freshman" and "First-year student" in ISS 210 are examples of demographic categories utilized within a college setting. When data is collected on the classification of students, such as freshmen, sophomores, juniors, or seniors, it often reflects categorical data, which represents characteristics that can be sorted into groups or categories. In the scenario where a statistics professor collects information summarized in a pie chart, this type of data is presented visually to highlight the proportions of each category within the total population.
In the various methods mentioned for collecting data:
- An organized sampling of 100 high school students by classification and selecting 25 from each is a method of stratified sampling.
- Using a random number generator to pick years and including all students in those years as sample points is an example of random sampling.
When college students graduate without securing employment and start looking for a job, they are considered as part of the unemployed category, specifically, they may be classified as frictionally unemployed, which is a type of short-term unemployment that occurs when individuals are transitioning between jobs or just entering the labor force.