Question

select the correct answer.

the designers of a standardized test are interested in knowing how long people take, on average, to complete the writing portion of the test. they decide to conduct an observation study at a testing facility. to avoid bias in their study, they create a list of the test takers scheduled to take the test this week. then, they randomly select 50 test takers from the list to be part of the study.

in this situation, what does the list of test takers represent?

the frame
the population
a control group
a sample

Explanation:

Identify the target group and the selection list

The target group of interest (the population) consists of all people who take the standardized test. The list created is the specific list of test takers scheduled to take the test this week, from which the sample of 50 test takers is randomly selected.

Define the statistical terms

• Population: The entire group of individuals we want information about (all test takers).
• Sample: A subset of the population from which data is actually collected (the 50 selected test takers).
• Sampling Frame: The actual list of individuals from which the sample is drawn (the list of test takers scheduled this week).
• Control Group: A group in an experiment that does not receive the treatment (not applicable to this observational study).

Match the list to its definition

The "list of test takers" represents the physical list from which the sample is drawn, which is defined as the sampling frame (or "the frame").

Answer:

• the frame (Correct answer)
• the population
• a control group
• a sample