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For a Normal Random Variable X with a mean of 80 and a Standard Deviation of...

For a Normal Random Variable X with a mean of 80 and a Standard Deviation of 7, find P(X<80)

Is there a formula to figure this out?

Math   Statistics-And-Probability   
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Answer #1

Yes,

P[X<80]

=P[Z<0]

=0.5.........................by using normal probability table.

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