A student researcher is asking participants to report the number of hours they studied for a recent exam and the letter grade they received. These are variables on a ___________ and ___________ respectively.
A) ratio; ordinal
B) ratio; interval
C) interval; nominal
D) interval; ordinal

Question

Quizplus · Accepted Answer

The variable "number of hours studied" is a continuous variable measured on an interval scale as it can take on any positive value and can be measured accurately using a standard unit of measurement such as hours. The variable "letter grade received" is an ordinal variable as letter grades have an order (e.g. A > B > C) but the intervals between grades are not necessarily equal. Therefore, the best choice is D - interval for number of hours studied and ordinal for letter grade received.

A Student Researcher Is Asking Participants to Report the Number