Mathematics, 14.04.2021 03:00 jonathansheehan26

The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1400 hours and a standard deviation of 50 hours. Using the empirical rule, determine what interval of hours represents the lifespan of the middle 68% of light bulbs.

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The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1400 h...