In: Statistics and Probability
et X be normally distributed with mean μ = 3.3
and standard deviation σ = 1.8. [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) = 0.0485. (Round "z" value
and final answer to 3 decimal places.)
d. Find x such that P(x
≤ X ≤ 3.3) = 0.1255. (Negative value should be
indicated by a minus sign. Round "z" value and final
answer to 3 decimal places.)