The video describes a study that found no statistical difference ...

[Anajune7]

The video describes a study that found no statistical difference in student graduation rates between those who submitted SAT scores and those who did not. When the researchers looked at the graduation rates of these two groups, what sample statistics did they most likely look at?
 A. The sample means of the two groups.
  B. The sample proportions of the two groups.

Question 2

The video describes a study that found no statistical difference in student GPAs between those who submitted SAT scores and those who did not. When the researchers looked at the GPAs of these two groups, what sample statistics did they most likely look at?
 A. The sample means of the two groups.
  B. The sample proportions of the two groups.

[lcapri7]

Answer to Question 1

B.The sample proportions of the two groups.

FEEDBACK:
A graduation rate describes the percentage (or proportion) of a particular group who graduated. So when researchers compare the graduation rates of two groups, they are comparing the sample proportions of the two groups they are studying.

Answer to Question 2

A.The sample means of the two groups.

FEEDBACK:
A GPA is a quantitative variable, meaning that you would compare the sample means of this variable of these two groups, not sample proportions. However, if instead they said that they found no statistical difference between the two groups in the proportions of students who had a GPA higher than 3.0, then they would be looking at sample proportions.

[Anajune7]

Thanks

[lcapri7]

Welcome