One teacher has a class composed entirely of girls; she finds that r between score on an English test and IQ is +.40 for her students. Another teacher has a class composed entirely of boys; she finds that r between score on an English test and IQ is +.55. Which of the following could not reasonably account for the discrepancy?
A) the relationship is different among boys and girls
B) one teacher calculated r by the raw score method and the other by the deviation score method
C) the tests of English were different tests
D) variation is expected among samples

Question

Quizplus · Accepted Answer

The method of calculating r (raw score vs. deviation score) does not affect the value of r; it is a mathematical property that remains consistent regardless of the calculation method.

One Teacher Has a Class Composed Entirely of Girls; She