Question

Let X be normally distributed with mean μ = 3.9 and standard deviation σ = 2.6....

Let X be normally distributed with mean μ = 3.9 and standard deviation σ = 2.6. [You may find it useful to reference the z table.]


a. Find P(X > 6.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places.)

b. Find P(5.5 ≤ X ≤ 7.5). (Round "z" value to 2 decimal places and final answer to 4 decimal places.)


c. Find x such that P(X > x) = 0.0594. (Round "z" value and final answer to 3 decimal places.)


d. Find x such that P(x ≤ X ≤ 3.9) = 0.3531. (Negative value should be indicated by a minus sign. Round "z" value and final answer to 3 decimal places.)

Math   Statistics-And-Probability   
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