Questions from Essentials of Statistics

Q: Parametric tests (such as t or ANOVA) differ from nonparametric

Parametric tests (such as t or ANOVA) differ from nonparametric tests (such as chi-square) primarily in terms of the assumptions they require and the data they use. Explain these differences.

Q: In a classic study, Loftus and Palmer (1974) investigated

In a classic study, Loftus and Palmer (1974) investigated the relationship between memory for eyewitnesses and the questions they are asked. In the study, participants watched a film of an automobile...

Q: A sample of n = 9 scores has ΣX = 108.

A sample of n = 9 scores has ΣX = 108. What is the sample mean?

Q: The Internet is rapidly becoming an essential source of information about health

The Internet is rapidly becoming an essential source of information about health, nutrition, finances, and current events. Neunschwander, Abbott, and Mobley (2012) were interested in inequality of acc...

Q: Captive animals in laboratories or zoos benefit from environmental enrichment. In

Captive animals in laboratories or zoos benefit from environmental enrichment. In a recent experiment on the effects of enrichment on animal behavior, Robbins and Margulis (2014) compared the effects...

Q: Many parents allow their underage children to drink alcohol in limited situations

Many parents allow their underage children to drink alcohol in limited situations when an adult is present to supervise. The idea is that teens will learn responsible drinking habits if they first exp...

Q: A recent study indicates that people tend to select video game avatars

A recent study indicates that people tend to select video game avatars with characteristics similar to those of their creators (Bélisle & Bodur, 2010). Participants who had created av...

Q: The student population at the state college consists of 30% freshmen

The student population at the state college consists of 30% freshmen, 25% sophomores, 25% juniors, and 20% seniors. The college theater department recently staged a production of a modern musical. A r...

Q: A developmental psychologist would like to determine whether infants display any color

A developmental psychologist would like to determine whether infants display any color preferences. A stimulus consisting of four color patches (red, green, blue, and yellow) is projected onto the cei...

Q: Data from the Department of Motor Vehicles indicate that 80% of

Data from the Department of Motor Vehicles indicate that 80% of all licensed drivers are older than age 25. a. In a sample of n = 50 people who recently received speeding tickets, 33 were older than a...