Question

A researcher wants to study the math scores of high school students in the state of Florida.

Select all

the samples that are biased.


Send a voluntary on-line questionnaire to all Florida high school students.


Randomly select 2,500 high school students in the state of Florida.


Select all students in 20 schools, selected through random sampling.


Select all students in all Miami high schools.

Answer 1

Using sampling concepts, it is found that these following sample is biased.

Select all students in all Miami high schools.

What is sampling?

It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.

In this problem, the only sample that does not englobe all of Florida is the one containing only students from Miami, hence the biased sample is:

Select all students in all Miami high schools.

More can be learned about sampling concepts at https://brainly.com/question/25122507