A Psychologist Is Interested in Whether Hypnosis Affects Brain Dominance

question 36

Multiple Choice

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained. Using a = 0.05 2 tail , your conclusion is _________.

• A) accept H 0 ; hypnosis has no affect on brain dominance
• B) retain H 0 ; we cannot conclude that hypnosis affects brain dominance
• C) reject H 0 ; hypnosis affects brain dominance
• D) change H 0

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Definitions:

Histogram

A graphical representation of the distribution of numerical data, where the data is divided into bins, and the frequency of data in each bin is depicted by the height of the bar.

Mean

The average of a set of numbers, calculated by adding them all up and dividing by the count of those numbers.

Median

The middle value in a data set when the values are arranged in ascending or descending order, or the average of the two middle values if there is an even number of values.

Skewed

Describes data that is not symmetrically distributed, often leaning more heavily towards one side of the scale.