Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is ______________ random sampling.

49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.

A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers.

Which sampling technique allows Lyra to group students based on race and randomly select students to create a representative sample of the school?

Sampling Technique: A toy manufacturer selects every 4^th toy to inspect on a production line to test for defects.

A poll on effective educational methods is taken by selecting 4 of the 10 departments at a local university and surveying all members in those groups.

To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day.

An education researcher randomly selects 48 middle schools and interviews all the teachers at each school.

Farmer Joe separates his farm into 10 regions.  He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm.  This is _____________ sampling.  

What kind of sample technique is the following:

Survey 130 names chosen out of a hat.

Willy wants to find what percent of students at his school drink milk after they finish their cereal. He randomly selects 10 students from each grade level (freshmen, sophomore, and junior, senior). What type of sampling is this?

Willy wants to find what percent of students at his school drink milk after they finish their cereal. He randomly selects 3 classrooms and surveys every student in those classrooms. What type of sampling is this?

A school chooses 3 randomly selected athletes from each of its sports teams to participate in a survey about athletics at the school. What kind of sampling technique is used?

Farmer Joe separates his apple tree farm into 10 regions.  He counts the number of apples produced in just one of the regions and uses that estimate to predict the number of apples produced on the whole farm.  This is _______ sampling.

Farmer Joe's apple tree farm is set up in 100 rows.  He counts the number of apples produced on every 10th row to estimate the number apples produced on the whole farm.  This is _____________ sampling.  

To study the amount of time students spend doing homework each day, use a random number generator to select 25 students from the student enrollment database to survey.

To study the amount of time students spend doing homework each day, use a random number generator to select 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors to survey.

The school librarian wants to determine how many students use the library on a regular basis.  What type of sampling method would she use if she chose to select every 3rd student who enters the library on Tuesday.