An Introduction to Statistics: An Active Learning Approach
Second Edition
Learning Objectives
After reading this chapter, you should be able to do the following:
- Identify when to use Pearson’s and Spearman’s correlations
- Interpret the sign and value of a correlation coefficient
- Draw and interpret scatterplots by hand and using SPSS
- Write null and research hypotheses using words and symbols
- Compute the degrees of freedom (df) and determine the critical region
- Compute a Pearson’s and Spearman’s correlation coefficients by hand (using a calculator)
- Determine whether or not you should reject the null hypothesis
- Compute an effect size (r2) and describe it
- Summarize the results of the analysis using American Psychological Association (APA) style
- Interpret the SPSS correlation output