An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.

This is an example of:

A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.

A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.

A researcher who is studying the effects of educational attainment on promotion conducted a survey of 50 randomly selected workers from each of these categories: high school graduate, with undergraduate degree, with master’s degree, and with doctoral degree. What technique is most appropriate?

Which of the following involves group-by-group selection of samples?

This type of sampling subdivides the population into subpopulations.

This type of sampling makes use of blocks or districts as a sampling frame in order to cut down a huge population size.

Ms. Nichol samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?

What type of sampling is this? Soybeans are planted on a 48-acre field. The field is divided into one acre subplots. A sample of plants is taken from each subplot to estimate the harvest.