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How do I Find the area under the standard normal curve over the interval specified below.Between z = -.44 and z = .44

math statistics
 Aug 18, 2014

Best Answer 

 #2
avatar+105634 
+10

Z scores.

Half the area is 0.17 the whole area is 0.17*2=0.34  

The area represents the probabliity that the score will fall in this region.  That is why the area under the whole curve has to be 1.  If something has to happen it has a probability of 1.

An area of 0.34 means that 34% of all the scores are expected to lie in this region.

That is 34% of all the data will have z scores of between -0.44 and 0.44

I hope that makes sense.  

 

 

 Aug 18, 2014
 #1
avatar+4473 
+5

Assuming a mean of 0 and a standard deviation of 1, you would find the probablility values for corresponding z-scores in the back of your book in Table 1, A.1, etc. Anyway, it would be 0.3401.

 Aug 18, 2014
 #2
avatar+105634 
+10
Best Answer

Z scores.

Half the area is 0.17 the whole area is 0.17*2=0.34  

The area represents the probabliity that the score will fall in this region.  That is why the area under the whole curve has to be 1.  If something has to happen it has a probability of 1.

An area of 0.34 means that 34% of all the scores are expected to lie in this region.

That is 34% of all the data will have z scores of between -0.44 and 0.44

I hope that makes sense.  

 

 

Melody Aug 18, 2014

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