Question
Asked Oct 20, 2019
58 views
 
Find the indicated area under the curve of the standard normal​ distribution, then convert it to a percentage and fill in the blank.
 
About​ _____% of the area is between
zequals

negative 1.5

 

and

zequals

1.5

 

​(or within

1.5
 

standard

deviations
 

of the​ mean).

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Expert Answer

Step 1

We have to find P(-1.5 < Z < 1.5) = ….?

Step 2

Using standard normal table:

P(Z<1.5) = 0.9332

We know
P(-1.5<Z<1.5) P(Z <1.5)-P(Z <-1.5)
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We know P(-1.5<Z<1.5) P(Z <1.5)-P(Z <-1.5)

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Step 3

Now we have to find P(Z<-1.5) = ………….?

P(Z<-1.5) = ...

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