Here's a thoughtful editorial from NYT on averages.

The author, Stephanie Coontz, gives some nice examples of what outliers can do to a mean, and how extreme scores can mislead us about patterns in our data. Have fun reading it!

Instructors: Request an Exam Copy

- Chapter 01; Psychology Is a Way of Thinking (34)
- Chapter 02; Sources of Information (35)
- Chapter 03; Three Claims, Four Validities (71)
- Chapter 04; Ethical Guidelines for Psychology Research (21)
- Chapter 05; Identifying Good Measurement (31)
- Chapter 06; Surveys and Observations (35)
- Chapter 07; Sampling (29)
- Chapter 08; Bivariate Correlation Research (98)
- Chapter 09; Multivariate Correlation Research (59)
- Chapter 10; Introduction to Simple Experiments (105)
- Chapter 11; More on Experiments (36)
- Chapter 12; Experiments with More Than One Independent Variable (44)
- Chapter 13; Quasi-Experiments and Small-N Designs (47)
- Chapter 14; Replicability, Generalization, and the Real World (48)
- Complex Experiments (Factorial Designs) (14)
- Correlational Studies (66)
- Ethics (10)
- Experiments (63)
- External Validity (14)
- Finding and Reading Literature (5)
- Identifying Claims (12)
- Internal Validity (10)
- Is this causal claim justified? (72)
- Multivariate Studies (29)
- Online Resources (23)
- Questions and Answers (80)
- Questions Only (145)
- Replication Updates (11)

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