Enjoy learning Statistics Online! Please be sure to share and subscribe to our YouTube channel.

ASK THE PROFESSOR FORUM

Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Problem 1

11.7 Finding r-squared the Coefficient of Determination

Use the crime data above to calculate the correlation coefficient for the variables % earning < $5,000 and murder rate. Is there linear relationship? If so is it positive or negative?
Note:
SSxx 199.732
SSxy 511.192
SSyy 1855.202

Calculate the coefficient of determination, r2 for the problem above and interpret it.
 

« back