Need help with basic confidence interval question - TI 84 Plus

[smaan]

Hello,

I need help using my TI 84 to figure out this 4 part question. My professor went over it way to quickly in class, when showing us how to do it on the TI 84, I believe its only a few quick steps for each part though.

EDIT: I have figured out part d, but am still struggling with parts a, b, and c.

http://imgur.com/981NWfD

Any help would be much appreciated!

Thanks

smaan

 

[Greg Bernhardt]

I'm sorry you are not finding help at the moment. Is there any additional information you can share with us?