Question

Find the critical value of Z 0.09 rounded two decimal places

Answer 1

0.8212

Answer 2

is the answer

Answer 3

It said 1.48... How would I have found that??

Answer 4

What about if I were trying to find the critical value of Za/2 that corresponds to the given confidence level. 91%

Answer 5

use your ti83, the invnorm function

Answer 6

Can you take me through the steps please

Answer 7

let me here your thoughts first ... whats your attempt

Answer 8

1-0.91.09

Answer 9

.09/2=.045

Answer 10

Now I don't know where to go from there

Answer 11

well you did that part just great

now is where we need to use an inverse function to get from area back to z value.

Answer 12

remember 2nd, VARS ??

Answer 13

yes

Answer 14

the invnorm function is in there ....

Answer 15

invnorm(.045) gives us the z score associated with it

Answer 16

-1.69

Answer 17

yes, but we tradiationally just use the positive of it.

Answer 18

ugh it says its wrong

Answer 19

oh ok. YES!! GOT IT! THANK YOU!!!!

Answer 20

yep