The life of a certain type of engine is normally distributed with a mean of 10 years, and a standard deviation of 1.5 years. If one engine is randomly selected, what is the probability that the life of this engine is between 8 and 13 years? find z score and probability
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Transcribed image text: The life of a certain type of engine is normally distributed with a mean of 10 years standard deviation of 1.5 years (1) If 2. engine is randomly selected, what is the probability that the life of this en is between 8 and 13 years? Find the z-score, and construct the standard normal distribution density curve, then shade your seeking area. a. b. Find the probability.
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