Please help me and show the steps also with your calculator.

User Generated

Qnexyrbcneq4

Mathematics

Description

What is the probability that the mean duration of these patients' pregnancies will be less than 264 days?

The mean is 262.

Standard deviation of 1.45

I know you have to put in Normal CDF, but what in the parenthesis?

Also, how is the answer 0.916?

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Explanation & Answer

 z value = (264-262)/1.45 = 2/1.45 =1.379 = 1.38

P( z < 1.38) = 0.916

In Excel i got 0.9161

if three decimals 0.916


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