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Question 5 Let Z be a standard normal random variable. (a) If P ( Z > c ) = 0.01, Find c ? (b) If P ( -a ? Z ? +a ) = 0.95, Find a ? (c) If P ( -b ? Z ? +b ) = 0.99, Find b ? Question 6 (a) If X is normal random variable with mean 500 and standard deviation 110, Find P ( X ? 800 ) (b) If X is normal random variable with mean 500 and standard deviation 120, Find P ( X ? 800 )

          Question 5
Let Z be a standard normal random variable.
(a) If P ( Z > c ) = 0.01, Find c ?
(b) If P ( -a ? Z ? +a ) = 0.95, Find a ?
(c) If P ( -b ? Z ? +b ) = 0.99, Find b ?

Question 6
(a) If X is normal random variable with mean 500 and standard deviation 110,
Find P ( X ? 800 )
(b) If X is normal random variable with mean 500 and standard deviation 120,
Find P ( X ? 800 )

Question 5
Let Z be a standard normal random variable.
(a) If P ( Z > c ) = 0.01, Find c ?
(b) If P ( -a ? Z ? +a ) = 0.95, Find a ?
(c) If P ( -b ? Z ? +b ) = 0.99, Find b ?

Question 6
(a) If X is normal random variable with mean 500 and standard deviation 110,
Find P ( X ? 800 )
(b) If X is normal random variable with mean 500 and standard deviation 120,
Find P ( X ? 800 )

Added by Tiffany F.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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04/26/2023

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Question 5 Let Z be a standard normal random variable: (a) If P(Z > z) = 0.01, find z. (b) If P(-ta < Z < ta) = 0.95, find ta. (c) If P(-b < Z < b) = 0.99, find b. Question 6 (a) If X is a normal random variable with a mean of 500 and a standard deviation of 110, find P(X > 800). (b) If X is a normal random variable with a mean of 500 and a standard deviation of 120, find P(X > 800).