Read each scenario and then identify the type of sampling used in that situation.
A teacher asks the students who've come early to class how much time they spend studying.
A teacher numbers the students in the class by fours and then asks every person assigned the number 3 how much time they spend studying.
A teacher randomly picks one row of students in each of her classes how much time they spend studying.
A teacher takes the names of all of her students, puts them into a spreadsheet, and randomly picks 20 female students and 10 male students to ask how much time they're spending studying.
A teacher takes the names of all of her students, puts them into a spreadsheet, and randomly picks 10 students to ask how much time they're spending studying.
Each of the entries into a contest are placed into a hat. Five entries are drawn from the hat to choose the winners.
The entries to a contest are arranged in the order they were received. Every fifth entry is selected to win a prize.
The entries to a contest are arranged by the age group of the submitter. Five winning entries are selected from those under age 20, ten from those age 20 to 40, and five from those over age 40.
The entries to a contest are divided by the grade level (Freshman, Sophmore, Junior, Senior) of the student. Two winning tickets from each grade are then selected.
A woman asks the other ladies in the dressing room after pilates class how many times a week they work out.
A woman goes to the gym where the men are working out. She randomly selects five men with hairy arms and five men without hairy arms to ask which brand of deoderant they use.
A farmer has a corn field with 150 rows of corn, each containing about 2000 corn plants. He divides the field into 12000 regions of 25 plants each. He then uses the random number generator in Excel to pick 20 regions and checks each of the 25 plants in those regions for disease.
An environmental biologist is taking an inventory of the plant life in a forest. She divides a section of the forest into 2m x 2m plots, randomly selects 5 plots, and then counts the number of each type of plant that occurs in those plots.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student randomly selects three names from a list of the full time faculty and then asks those faculty members.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student emails every faculty member to ask them and uses the first three responses.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student gets a list of full time faculty, divides it into males and females instructors, and then asks two female and two male instructors.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student randomly selects one of the office complexes on campus and asks all faculty in that complex their opinion.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student randomly selects one of the office complexes on campus and asks all faculty who are in their offices their opinion.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student takes a list of the faculty members and selects every fifth name on the list to interview.
A student is required to interview at least three faculty members to determine their opinion on the Farm Progress Show coming to Decatur. The student takes small photos of each of the faculty and places them on a dart board and then throws three darts at the board. The student interviews the three faculty members who were hit by the darts.