We are about to test a hypothesis using data from a well-designed study. Which is true?
I. A large P-value would be strong evidence against the null hypothesis.
II. We can set a higher standard of proof by choosing α = 10% instead of 5%.
III. If we reduce the risk of committing a Type I error, then the risk of a Type II error will also
Decrease.
A) III only
B) II only
C) none of these
D) I only
E) I and II only

Question

Quizplus · Accepted Answer

A large P-value indicates weak evidence against the null hypothesis, not strong evidence. Setting α = 10% instead of 5% lowers the standard of proof, not raises it. Reducing the risk of a Type I error (by lowering α) generally increases the risk of a Type II error, not decreases it.

We Are About to Test a Hypothesis Using Data from a Well-Designed