John Believes That Saturdays Are More Likely to Be Cloudy

Multiple Choice

John believes that Saturdays are more likely to be cloudy or rainy than weekdays are. However, he is relying entirely on casual impressions; he has never collected data systematically to test his hypothesis. His belief is most likely an example of

A) an illusory correlation.
B) an independent variable.
C) a case history.
D) a placebo.