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A researcher measures extroversion in 50 male and female twin pairs. The males had a mean extroversion score of 20. The females had a mean extroversion score of 22. The standard deviation of the difference scores was 3. Is there a difference between male and female twins in extroversion? a) Identify the independent and dependent variables. What are the levels of the IV? b) Identify your null and alternative hypotheses. Write them out in symbols and in words. c) What type of statistical test you will perform? d) What is the alpha level? What are the degrees of freedom? How many tails? What is your critical t value? e) Conduct a statistical test of the hypothesis. Write out the formula. Report the p-value. f) Interpret your results in English ( put into words, using words and symbols). Be sure to make a decision on whether you should reject or retain your null hypothesis

A researcher measures extroversion in 50 male and female twin pairs. The males had a mean extroversion score of 20. The females had a mean extroversion score of 22. The standard deviation of the difference scores was 3. Is there a difference between male and female twins in extroversion? a) Identify the independent and dependent variables. What are the levels of the IV? b) Identify your null and alternative hypotheses. Write them out in symbols and in words. c) What type of statistical test you will perform? d) What is the alpha level? What are the degrees of freedom? How many tails? What is your critical t value? e) Conduct a statistical test of the hypothesis. Write out the formula. Report the p-value. f) Interpret your results in English ( put into words, using words and symbols). Be sure to make a decision on whether you should reject or retain your null hypothesis

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A researcher measures extroversion in 50 male and female twin pairs. The males had a mean extroversion score of 20. The females had a mean extroversion score of 22. The standard deviation of the difference scores was 3. Is there a difference between male and female twins in extroversion? a) Identify the independent and dependent variables. What are the levels of the IV? b) Identify your null and alternative hypotheses. Write them out in symbols and in words. c) What type of statistical test you will perform? d) What is the alpha level? What are the degrees of freedom? How many tails? What is your critical t value? e) Conduct a statistical test of the hypothesis. Write out the formula. Report the p-value. f) Interpret your results in English ( put into words, using words and symbols). Be sure to make a decision on whether you should reject or retain your null hypothesis
Transcribed Image Text:A researcher measures extroversion in 50 male and female twin pairs. The males had a mean extroversion score of 20. The females had a mean extroversion score of 22. The standard deviation of the difference scores was 3. Is there a difference between male and female twins in extroversion? a) Identify the independent and dependent variables. What are the levels of the IV? b) Identify your null and alternative hypotheses. Write them out in symbols and in words. c) What type of statistical test you will perform? d) What is the alpha level? What are the degrees of freedom? How many tails? What is your critical t value? e) Conduct a statistical test of the hypothesis. Write out the formula. Report the p-value. f) Interpret your results in English ( put into words, using words and symbols). Be sure to make a decision on whether you should reject or retain your null hypothesis
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