A Researcher Records the Number of Mistakes Made During a Memory

question 22

Multiple Choice

A researcher records the number of mistakes made during a memory skills task.He finds that the probability that participants in this study made 0 mistakes is p = .22; made 1 mistake is p = .30; made 2 mistakes is p = .16; made 3 mistakes is p = .12; and made 4 or more mistakes is p = .25.Is this probability distribution accurate?

• A) Yes, it distributes all possible outcomes for the random variable.
• B) No, one of the outcomes is stated as "or more."
• C) No, the probability distribution does not sum to 1.0.
• D) No, one of the outcomes is stated as "or more" and the probability distribution does not sum to 1.0.

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Definitions:

Peanut Butter

A food paste or spread made from ground dry roasted peanuts, often containing additional ingredients that modify its taste or texture.

Jelly

Jelly is a clear or translucent fruit spread made from sweetened fruit juice and set with gelatin or pectin.

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The extra pleasure or benefit gained by a consumer from having an additional unit of a product or service.

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A root vegetable, often confused with turnips, known for its purple skin and yellow flesh; used in cooking for its mild, sweet flavor.