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A psychologist determined that the number of sessions required to obtain the trust of a...

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Statistics

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A psychologist determined that the number of sessions required to obtain the trust of a new patient is either 1 2 or 3 Let x be a random variable indicating the number of sessions rec the patient s trust The following probability function has been proposed for x 1 2 or 3 f x a Is this probability function valid Explain This probability distribution Select valid because Select for x 1 2 3 Also f x b What is the probability that it takes exactly 2 sessions to gain the patient s trust Round your answer to three decimal places c What is the probability that it takes at least 2 sessions to gain the patient s trust Round your answer to three decimal places

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