Refer to the following paragraph to answer the questions below.
Maria Valencia developed a new test to measure intelligence or I.Q. She claimed that using her test, someone with an I.Q. of 180 would be considered twice as intelligent as someone with an I.Q. of 90. Someone with a score of 0, had absolutely no intelligence. In order to see how good it was, she tested two groups of students with her new test during the first week of the semester. One group scored low on existing I.Q. tests. The other scored very high. She found that those who scored low on old tests usually scored low on her new test, while those who scored very high on old tests usually scored high on the new test. In addition, she had the group of people who took the new test retake it at the midterm and again at the end of the semester. She found that a person's I.Q. score did not change across the three times it was measured during the semester.
-What is the level of measurement of her new test?
A) ratio variable
B) nominal variable
C) ordinal variable
D) interval variable

Question

Quizplus · Accepted Answer

Maria Valencia's new test measures intelligence on a scale where a score of 0 indicates no intelligence, implying that there is a true zero point. This characteristic, along with the ability to say that a score of 180 is twice as much as a score of 90, indicates that the test is measured on a ratio scale, which is the only scale of measurement that includes a true zero point and allows for the comparison of absolute magnitudes.

Refer to the Following Paragraph to Answer the Questions Below