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6.- Find the area under the standard normal distribution: to the left of z=-1.55.

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Answer:


P(z<-1.55)=0.0606

Explanation:

For this case we want to find this probability:


P(z<-1.55)

Because they want the area to the left of the value. We need to remember that the normal standard distribution have a mean of 0 and a deviation of 1.

We can use the following excel code: =NORM.DIST(-1.55,0,1,TRUE)

And we got:


P(z<-1.55)=0.0606

The other possibility is use the normal standard table and we got a similar result.

User Angordeyev
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