Medal and Fan will be given!!

The length of human pregnancies varies according to an approximately normal distribution with a mean of 266 days and variance of 256 days.

How long are the longest 2.5% of all pregnancies?

(Explanation question. No multiple Choice) Please help!

Question

Medal and Fan will be given!!

The length of human pregnancies varies according to an approximately normal distribution with a mean of 266 days and variance of 256 days.

How long are the longest 2.5% of all pregnancies?

(Explanation question. No multiple Choice) Please help!

anonymous · Answer

@pooja195 @dan815 @ganeshie8 @Hero @Kainui @kiamousekia @Howard-Wolowitz

anonymous · Answer

@Abhisar Please Help.

anonymous · Answer

@Abhisar Can you please help. This is my last question.

anonymous · Answer

need help please @Michele_Laino

michele_laino · Answer

here we have to refer to the "erf" function

anonymous · Answer

Okay. That is what I am confused on... @Michele_Laino

michele_laino · Answer

the standard deviation, of your distribution, is:
$$\Large \sigma  = \sqrt {256}  = 16$$

anonymous · Answer

Okay. I got it so far @Michele_Laino

anonymous · Answer

So now what? @Michele_Laino

michele_laino · Answer

please wait, I'm working on your question...

anonymous · Answer

Oh yeah sure. Take your time :D @Michele_Laino

michele_laino · Answer

I think that your problem requests for this value:
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