Suppose X Is a Normal Random Variable With $\mu = 40$

question 131

Multiple Choice

Suppose X is a normal random variable with $\mu = 40$ and $\sigma = 20$ . Find the value of $P ( 30 \leq X \leq 45 )$ . Please, round the answer to four decimal places.

• A) \(P ( 30 \leq X \leq 45 ) = 0.8549\)
• B) \(P ( 30 \leq X \leq 45 ) = 0.2892\)
• C) \(P ( 30 \leq X \leq 45 ) = 0.7098\)
• D) \(P ( 30 \leq X \leq 45 ) = 0.2902\)
• E) \(P ( 30 \leq X \leq 45 ) = 0.2912\)

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