normally distributed with a mean of 1150 hours and a standard deviation of 175 hours. (Note: For z-scores, round off to two decimal places.) What is the probability that a randomly chosen light bulb will have a lifespan of more than 1000 hours? 80.23% 80.51% 19.77% 19.49% Given the following values: Min=18, Max=58, Q1=24, Q3=41, what is the interquartile range?

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