Question: The lifetime of a cheap light bulb is an exponential random variable with mean 36 hours. Suppose that 16 bulbs are tested and their lifetimes

The lifetime of a cheap light bulb is an exponential random variable with mean 36 hours. Suppose that 16 bulbs are tested and their lifetimes measured. Use the central limited theorem to estimate the probability that the sum of the lifetimes is less than 600 hours.

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