A Researcher Records the Number of Mistakes Made During a Memory

question 55

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)both B and C

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