z-score table help? will medal and fan

Question

jessicawade · Answer

I want to learn how to find the z-score of my problem, i have my negative and positive a-2 chart but i need help solving a problem?

jessicawade · Answer

my problem is:

1.Assuming a standard normal distribution, find the area between –2.87 and 1.34.

    A.	-0.7650
    B.	0.0021
    C.	 0.9099
    D.	0.9078

jessicawade · Answer

*-2.87

anonymous · Answer

hmm......... isn't the area multiplying tho?

dumbcow · Answer

First find area less than z = 1.34
Then find area less than z = -2.87

Subtract these numbers to get area between :)
in general P(A<z<B) = P(B) - P(A)

jessicawade · Answer

what do you eman find areas less than 1.34?

dumbcow · Answer

in your table, look up z value to find area

dumbcow · Answer

example http://faculty.elgin.edu/dkernler/statistics/ch07/images/left1.gif here area less than z =-2.84 is .0023