If we erroneously conclude that motorists are more likely to honk at low status cars than high status cars, we
A) have made a Type I error.
B) have made a Type II error.
C) would have made that conclusion 5% of the time if the null hypothesis were true.
D) both a and c

Question

Quizplus · Accepted Answer

A Type I error occurs when we incorrectly reject a true null hypothesis, which in this context means we wrongly conclude there is a difference (e.g., more honking at low status cars) when there is none. The statement in option C, indicating a 5% probability of making this conclusion if the null hypothesis is true, describes the significance level, often denoted as alpha, which is commonly set at 0.05 for testing hypotheses and is related to the probability of making a Type I error.

If We Erroneously Conclude That Motorists Are More Likely to Honk