Question

find the critical value Zc necessary to form a confidence interval at the level of confidence shown below,
c=0.80

Answer 1

help with the Ti-84 cac too

Answer 2

ok so i got .1 now how do i plug it in to the calculator

Answer 3

k so the critical value you do 1-c/2

Answer 4

that tells you the area on each side of the curve

Answer 5

so 1 - .1 divided by 2

Answer 6

Now get a z chart

Answer 7

and find the corresponding value of z for a p value of 0.1

Answer 8

that is your critical value at an 80% confidence

Answer 9

.95

Answer 10

so the z value at a p value of 0.1 is 0.5398...

Answer 11

http://www.bing.com/images/search?q=statistics+z+chart&id=D9A3549C841A2D297062C0EE047375EECB42DFA8&FORM=IQFRBA#view=detail&id=D9A3549C841A2D297062C0EE047375EECB42DFA8&selectedIndex=0

Answer 12

i dont understand the charts

Answer 13

where did you go