The Lifespan of Salmon Flies Is Normally Distributed with a Mean

Short Answer

The lifespan of salmon flies is normally distributed with a mean of 60 days and a standard deviation of 20 days.
What percentage of a salmon fly population lives less than 12 days?
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What percentage of a salmon fly population lives between 80 and 101 days?
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Find the value x₀ such that 6.3% of a salmon fly population live less than x₀ days.
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