Question

For a 99% confidence interval based on the t (8) distribution? t*=?

Answer 1

3.355

Answer 2

How?

Answer 3

look it up in a t-distribution table or in Excel

Answer 4

How come you don't subtract one from the degrees of freedom?

Answer 5

I think just the typo!

Answer 6

the degree of freedom is 7

Answer 7

http://en.wikipedia.org/wiki/Student%27s_t-distribution#Table_of_selected_values

Answer 8

significant level is 1/2%

Answer 9

i assumed 8 was the degrees of freedom

Answer 10

whats the sample size?
degree of freedom is one less than sample size

Answer 11

when it said 95% CI for t(20), I had to do 20-1. Now for 99% CI for t(8) I don't do 8-1. I got both correct.