Power_and_Effect_size_Exercises

Power_and_Effect_size_Exercises - March 8, 2010 Power and...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
March 8, 2010 Power and Effect Size Objectives of the exercises: I To understand the logic of hypothesis testing and associated terminology II To understand the concept of Power (the probability of getting significant results if the research hypothesis is true) III To understand the concept of effect size and how it's calculated IV To understand the relationship between effect size and power Multiple Choice Questions 1. If you use the .01 significance level instead of the .05 significance level, you increase the chance of… a) incorrectly supporting the research hypothesis b) incorrectly rejecting the null hypothesis c) a Type II error d) a Type I error 2. Statistical power can be defined as a. the effect that the result of the study will have on the area of applied psychology. b. the probability of rejecting the null hypothesis if in fact the null hypothesis is true. c. having a large enough effect size in order to always get a significant results. d. The probability that the study will yield a significant result if the research hypothesis is true. 3. Researchers interested in making practical applications are most likely to want to minimize a) significance levels b) effect sizes c) Type I errors d) Type II errors
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4. If in a planned experiment the population distribution expected under the research hypothesis and the known populations have almost no overlap at all, the planned experiment has a) a large effect size b) a moderate effect size c) a small effect size d) no statistical importance 5. How does the number of subjects affect power? a)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

Power_and_Effect_size_Exercises - March 8, 2010 Power and...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online