Confidence Interval Question

[kyle86]

I have to find a 90% confidence interval for a mean, and i'm only given the S and the x-bar for a sample population of 60. How do I find the t* for this if the degrees of freedom chart only goes up to 50, and i need 59?

Thanks

[ming_dynasty1369]

That's what im trying to figure out!

i dont know how to calculate, but i looked online for some more detailed tables
TRY THESE:
http://www.ento.vt.edu/~sharov/PopEcol/tables/t.html

http://www.itl.nist.gov/div898/handb...n3/eda3672.htm

http://helios.bto.ed.ac.uk/bto/statistics/table1.html

hope this helps!