Statistics

A researcher uses a matched-subjects design to investigate whether single people who own pets are generally happier than singles without […]

The previous problem demonstrates that removing individual differences can substantially reduce variance and lower the standard error. However, this benefit

A researcher for a cereal company wanted to demonstrate the health benefits of eating oatmeal. A sample of 9 volunteers

A variety of research results suggest that visual images interfere with visual perception. In one study, Segal and Fusella (1970)

Researchers have noted a decline in cognitive functioning as people age (Bartus, 1990). However, the results from other research suggest

How would you react to doing much worse on an exam than you expected? There is some evidence to suggest

Research results indicate that physically attractive people are also perceived as being more intelligent (Eagly, Ashmore, Makhijani, & Longo, 1991).

Strack, Martin, and Stepper (1988) reported that people rate cartoons as funnier when holding a pen in their teeth (which

Research has shown that losing even one night’s sleep can have a significant effect on performance of complex tasks such

For the following studies, indicate whether a repeated measures t test is the appropriate analysis. Explain your answers. a. A