Area of a normal curve

dcc3038026

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Sep 8, 2008
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Can You Find The Percent Of Total Area Between Z = -2.49 And Z = 1.19 Under A Normal Curve That Is?

This is what I got but my instructor says it not right. What am I doing wrong?

Check the values of z in the area table under the unit normal curve:

Area under z = -2.49 is 0.4936
Area under z = 1.19 is 0.3880

Total area = 0.8816

Now, the total area under the normal curve is 1, and total area of z is 0.8816. This shows that percent of area between z = -2.49 and z = 1.19 is 88.16%.
 
Check z = 1.19. I'm guessing it's a typo. 0.3830 might be considered closer.
 
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