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g100num [7]
3 years ago
5

What is the probability that the lifetime of a fan exceeds the mean value by more than 3 standard deviations?

Mathematics
1 answer:
ExtremeBDS [4]3 years ago
8 0
68.2 % of the data is within one σ, either side of the mean
95.4 % of the data is within two σs, either side of the mean
99.7 % of the data is within three σs, either side of the mean
Therefore, 0.3 % of values lie outside the range of value of three σs.
We can say this is representative of the chance that a value (in this case, the lifetime of the fan) will exceed the mean value by more than three σs.
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