SOLUTION: I am struggling understanding the current question. I have examples but I need it broken down step by step. And also need the steps if the problem can be completed by a TI-84 plus.

Algebra ->  Probability-and-statistics -> SOLUTION: I am struggling understanding the current question. I have examples but I need it broken down step by step. And also need the steps if the problem can be completed by a TI-84 plus.      Log On


   

Question 900350: I am struggling understanding the current question. I have examples but I need it broken down step by step. And also need the steps if the problem can be completed by a TI-84 plus. PLEASE DO NOT JUST GIVE THE ANSWER! PLEASE SHOW THE WORK. I am struggling to understand and giving something like: invNorm(.123) doesn't help me understand.

The question:
Compute the critical value Za/2 that corresponds to a 82% level of confidence.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

100%-82% = 18%, 18%/2 = 9%, z = invNorm(.09) = -1.341

(100%-9) = 91%,   z = invNorm(.91) = .81859 = 1.341

the Idea is IF z-value is the left or right of the Green Lines...

That is the Critical Area under the Standard Normal Curve for a

two-tailed 82% level of confidence