Question

Find the value of z in the following..
just to double-check my answer..
@ganeshie8

Answer 1

\[P(Z>z)=0.4460\]

Answer 2

I got z=0.136 as my answer..

Answer 3

Are you using a z table ?

Answer 4

yep

Answer 5

can we use calculator to check our answer?

Answer 6

That looks good to me. May I know how you arrived at that ?

Answer 7

0.4483-0.0024=0.4459

Answer 8

What are 0.4483 and 0.0024 ?

Answer 9

i'm using the z table.. hard to describe it.. xD

Answer 10

Haha, I know. Just try and tell me in whatever way you can :)

Answer 11

The way I did is a bit different, but I also got the same answer. Wanna see my method ?

Answer 12

yes,i wanna to see it.. :)

Answer 13

I'm using below z-table which gives the probability to the LEFT of a z value.

http://www.stat.ufl.edu/~athienit/Tables/Ztable.pdf

Answer 14

But we want the z value which corresponds to the probability to the RIGHT.

Answer 15

yep

Answer 16

The total area under the curve is 1.
This area also represents the probability.

Answer 17

The z-value corresponding to the probability of 0.446 to the RIGHT

would be same as

the z-value corresponding to the probability of 1-0.446 to the LEFT

Answer 18

1-0.446 = 0.554

Answer 19

ok

Answer 20

Simply look at the ztable I gave earlier for the area 0.554

Answer 21

ok..
*looking*

Answer 22

a bit confused..

Answer 23

Notice that the highlighted part 0.5517 is closer to the number we're looking for

Answer 24

What are the row and column values for that highlighted number ?

Answer 25

sorry for the late reply..
is it 0.1 and 0.03 ? @ganeshie8

Answer 26

Yes, so the z value would be 0.13