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Suppose that 10% of the probability for a certain distribution that is N(µ, σ2 ) is...

Suppose that 10% of the probability for a certain distribution that is N(µ, σ2 ) is below 60 and that 5% is above 90. What are the values of

(a) µ?

(b) σ?

Math   Statistics-And-Probability   
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