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Mr. Glenn, Math and Stat Expert

Category: Calculus and Above

Satisfied Customers: 607

Experience: Math Professor for at least 15 yrs

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A noted psychic was tested perception. The psychic was

Customer Question

A noted psychic was tested for extrasensory perception. The psychic was presented with 240 cards face down and asked to determine if each card were one of five symbols: a star, a cross, a circle, a square, or three wavy lines. The psychic was correct in 75 cases. Let p represent the probability that the psychic correctly identifies the symbol on the card in a random trial. Assume the 240 trials can be treated as a simple random sample from the population of all guesses the psychic would make in his lifetime.

if p represent the probability that the psychic correctly identifies the symbol on the card in a random trial

then p = 75 / 240 or simply 5/16

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