amrobinson9280 amrobinson9280

24-05-2023
Mathematics

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Determine the Z-scores and probabilities for the situation below: Light bulb life is normally distributed with a mean of 70 hour and a standard deviation Suppose one individual is randomly chosen. Let X = bulb life of a bulb. a. Determine the z-Score for a bulb with a bulb life of 65 hours. b. Determine the probability of a bulb's life lower than 65 hours.

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