What is the Confidence interval of this...?

[Mayu93]

HI Friends,

I've attached excel sheet having 19 records. Can you guys pls help me in finding 95% confidence interval for this. I tried finding it all way, but I'm not getting correct answer.

Should t- distribution or Normal distribution be used..?

I Thank in advance. Pls help me in finding right answer friends.

Mahesh

 

[joeb33050]

There are 19 numbers on the list. What is the question. 95% confidence interval of what? What is the question, what are you trying to find?