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# Hi!! My question is based on a solution that´s publiced here. It is from the book...

Hi!!

My question is based on a solution that´s publiced here. It is from the book Stats and question 9, chapter 5, step 2.

I wonder how:

= p(Z<0.57) in the next step turns into:

= 0.7161

It says that they used exel, but I wonder how to calculate this by hand.

We have to find the probability that:

p(Z<0.57) =0.7157 ### By using z table.

Since Z is a standard normal variable, we have to look in to the standard normal distribution table.

There we have to search for z score of 0.57 and the corresponding value in the row is the required probability.

The part of z table shown in following figure

### By using excel function: =NORMDIST(0.57,0,1,1)

P(Z<0.57)=0.7157

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