Questions from Essentials of Statistics

Q: The Muller-Lyer illusion is shown in the figure. Although

The Muller-Lyer illusion is shown in the figure. Although the two horizontal lines are the same length, the line on the left appears to be much longer. To examine the strength of this illusion, Gillam...

Q: The following sample of n = 5 scores was obtained from a

The following sample of n = 5 scores was obtained from a population with unknown parameters. Scores: 20, 25, 30, 20, 30 a. Compute the sample mean and variance. (Note: These are descriptive values tha...

Q: Find the t value that forms the boundary of the critical region

Find the t value that forms the boundary of the critical region in the right-hand tail for a two-tailed test with α = .05 for each of the following sample sizes. a. n = 9 b. n = 16 c. n = 36 d. Repeat...

Q: Recent research has shown that creative people are more likely to cheat

Recent research has shown that creative people are more likely to cheat than their less-creative counterparts (Gino & Ariely, 2012). Participants in the study first completed creativity assessment...

Q: Anxiety affects our ability to make decisions. Remmers and Zander (

Anxiety affects our ability to make decisions. Remmers and Zander (2018) demonstrated that anxiety also prevents us from intuiting about our environments. In their experiment, 111 participants were ra...

Q: Positive events are great, but recent research suggests that unexpected positive

Positive events are great, but recent research suggests that unexpected positive outcomes (e.g., an unseasonably sunny day) predict greater-than-normal amounts of risk-taking and gambling (Otto, Flemi...

Q: What information is available about the scores in a regular frequency distribution

What information is available about the scores in a regular frequency distribution table that you cannot obtain for the scores in a grouped table?

Q: Binge-watching a television show might not be the best way

Binge-watching a television show might not be the best way to enjoy a television series (Horvath, Horton, Lodge, & Hattie, 2017). Participants in an experiment watched an entire television series...

Q: What causes us to overeat? One surprising factor might be the

What causes us to overeat? One surprising factor might be the material of the plate on which our food is served. Williamson, Block, and Keller (2016) gave n = 68 participants two donuts each and measu...

Q: In a classic study in the area of problem solving, Katona

In a classic study in the area of problem solving, Katona (1940) compared the effectiveness of two methods of instruction. One group of participants was shown the exact, step-by-step procedure for sol...