Question

determine the area under the standard normal curve that lies to the left of (a) z=0.03 (b) z=-1.19 (c) z=-0.99 (d) z=-1.38

Answer 1

To find the answer to (a) use the 'ztable2.jpg' which applies to positive values of z. Look at the top row and find 0.03. What value lies immediately below 0.03 ?

Answer 2

0.5120?

Answer 3

z.03 = .5120 is correct

Answer 4

the rest are the same process. find the z value and write the number of the cross down

Answer 5

Now use the 'ztable1.jpg' which is for negative values of z to find (b), (c) and (d)

Answer 6

To find (b) go down the left hand column to the z value -1.1. Then go across to the far right column to find the value.

Answer 7

oh I get it now. thanks!

Answer 8

You're welcome :)