Mathematics, 06.05.2020 03:59 mrsburrus

The lifetimes of 20,000 light bulbs are normally distributed. The mean lifetime is 230 days. The standard deviation is 40 days. Find the values defined by the standard deviation in a normal distribution for 3 standard deviations

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The lifetimes of 20,000 light bulbs are normally distributed. The mean lifetime is 230 days. The sta...

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