Questions below will be based on the following: A researcher wishes to test the hypothesis that intelligence is a sex-linked characteristic. A random sample of 1000 women is selected and given IQ tests. Similarly, a random sample of 1000 men is selected and also given IQ tests. The mean IQ's of the two groups are compared and the difference is found to be significantly in favor of the females.
-This study proves that
A) a causal relationship exists between sex and intelligence
B) a causal relationship exists between intelligence and sex
C) sex and intelligence interact to cause an effect above and beyond either of the variables taken separately
D) this study does not address the question of causality, since it is

Question

Quizplus · Accepted Answer

This study does not address the question of causality, since it is an observational study and no manipulation or control of variables was done. Therefore, we cannot infer a causal relationship between sex and intelligence. We can only say that there is a correlation or association between the two variables.

Questions Below Will Be Based on the Following: a Researcher