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Find the area under the standard normal curve over the interval specified below. Between z = –2 and z = 1.2

 Dec 24, 2018
 #1
avatar+95171 
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I suggest that you use this site. It is really good for questions like this.

 

http://davidmlane.com/hyperstat/z_table.html

 Dec 24, 2018
 #2
avatar+94453 
+1

Thanks, Melody, for that resource....!!!

 

By hand we can do this:

 

Area between z = 0  and z = 1/2  =   .6915 - .5000 =  .1915

 

Area between z = 0  and z = -2  =  .5000 - .0228  = .4772

 

The probability (area) is the sum of these

 

So.....the probability (area)  is   .1915 + .4772   =  .6687

 

 

cool cool cool

 Dec 24, 2018

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