can someone please explain to me why the critical value for the 99% confidence level with n-1=34 degrees of freedom is equal to 2.728?

Question

zarkon · Answer

do you not believe your t table?

anonymous · Answer

i'm just confused as to how the critical value is 2.728. how do you find it on the t table? because that particular number is not listed

zarkon · Answer

does your table have a column for confidence intervals or just one and two tails?

anonymous · Answer

it lists the confidence levels on the bottom, on the top it lists one tail and two tail, and on the sides it list degrees of freedom

anonymous · Answer

and it doesn't have 34 as one of the degree of freedom listed

zarkon · Answer

ah...well that is a problem.  You need a better table or use a calculator or computer the get the 2.728

anonymous · Answer

can you tell me step by step how to find it on the calculator? i tried googling it but it hasn't given me that #

zarkon · Answer

depends on what calculator you have

anonymous · Answer

i have the ti84 plus

zarkon · Answer

there is a list of distributions somewhere in the calculator...can you find those?

anonymous · Answer

yes

zarkon · Answer

you see the inverse t distribution?

anonymous · Answer

yes

zarkon · Answer

good..use that function

zarkon · Answer

use .995 and 34 d.f.

anonymous · Answer

i got it! thank you so much!!

zarkon · Answer

np

zarkon · Answer

you understand why we use .995 and not .99?

anonymous · Answer

actually.. no. why do we use that instead of .99?

zarkon · Answer

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