What are the assumptions of the Wilcoxon rank-sum test?

What will be an ideal response?


The data are ratio, interval, or ordinal in scale and are converted to an ordinal (ranking) scale before conducting the test, the underlying distribution is not normal, and the observations are independent.

Psychology

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Which of the following statements would the authors of your text most likely endorse as it relates to the identification of childhood disorders?

a. The identification of childhood disorders is currently unnecessary because many interventions have been identified to help with a variety of disorders. b. The identification of childhood disorders is currently unnecessary because many disorders are limited to the period of childhood and therefore unnecessarily stigmatize children. c. The identification of childhood disorders is important as it aids in research, communication, and continued understanding of how to better treat childhood disorders. d. The identification of childhood disorders is necessary because it leads to the identification of other disorders that were once thought to only exist in adulthood.

Psychology

Which of the following students provides the best summary of the viewpoint that language is modular?

a. Eleanor: "We can generate a virtually infinite number of sentences in a given language." b. Anthony: "We process language in a different way than we perform other cognitive tasks." c. Svetlana: "Language is interconnected with many other cognitive tasks, such as working memory and decision making." d. Oswald: "Language is based on the model that memory is divided into sensory memory, working memory, and long-term memory."

Psychology

According to the textbook, the one level of Maslow's hierarchy that is particularly difficult to assess accomplishment of is:

A. physiological needs B. safety needs C. self-actualization needs D. incentive needs

Psychology

Regarding both anorexia nervosa and bulimia nervosa, which of the following statements is FALSE?

a. Vomiting reduces the anxiety of the bulimic, which makes purging highly reinforcing. b. Girls who spend a lot of time reading teen magazines are more likely to have distorted body images and unrealistic ideas about how they compare with others. c. Most people suffering from eating disorders will eventually seek help on their own. d. People engaged in sports, such as wrestling, gymnastics, pole vaulting, high jumping, and cycling are particularly likely to develop eating disorders.

Psychology