**Smiles and Leniency**

Will a smiling person accused of a crime be treated more leniently than one who is not smiling? If so, does the type of smile make a difference?**Concepts**: quantile/boxplots, contrasts among means, Dunnett's test, Bonferroni correction

**Weapons and Aggression**

Does the mere presence of a weapon increase the accessibility of aggressive thoughts? **Concepts**: quantile and box plots, stem and leaf displays, one-sample t test, confidence interval, within-subjects ANOVA, consequences of violation of normality assumption

**Magnets and Pain Relief**

Can the application of magnetic fields be an effective treatment for pain? **Concepts**: boxplots, stem and leaf displays, correlated t test, two-sample t test, repeated measures analysis of variance, analysis of covariance

**Instructor Reputation and Teacher Ratings**

Does an instructor's reputation affect ratings of the instructor's lecture? **Concepts**: boxplots, stem and leaf displays, two-sample t tests, analysis of variance

**Diet and Health**A low-fat diet was compared to a "Mediterranean diet." See which led to better health.

**Physical Strength and Job Performance**

How does one select employees to perform physically demanding jobs? This case study examines the relationship between isometric strength tests and job performance for 147 workers.**Concepts**: correlation, linear regression, multiple regression

**Who is Buying iMacs?**

What proportion of the iMac purchasers are new computer owners?**Concepts**: confidence intervals, proportion, normal approximation to binomial

**Natural Language Interface**

Is it easier to learn to use computer software that uses natural languge commands?**Concepts**: analysis of covariance, adjusted means, boxplots

**Physicians' Reactions to Overweight Patients**

Do physicians discriminate against overweight patients? This study indicates that, at least in one respect, they do.**Concepts**: t test, means, boxplots