Question

can someone show me how to use a t table? (for statistics) i need to find the value associated with the upper 10% of the t distribution and 23 degrees of freedom

Answer 1

Have you tried looking up a table of critical values for the t test?

Answer 2

yes, i have the t table, i'm just not sure what it means by the upper 10% because n the top of the table, it has one tail and two tail, and for both of them, they have .10 so i'm a bit confused on which tail to use to find the t value

Answer 3

on*

Answer 4

In your problem only the upper 10% of the t distribution is concerned. Therefore this is a one-tail test where the null hypothesis is rejected if the test statistic falls in the right hand tail, but is accepted if it falls in the left hand tail. Have you looked at the column for 1-tail, 10% against v = 23?

Answer 5

i got 1.319

Answer 6

if it were a two-tail test, how would it be worded?

Answer 7

1.319 is the critical value for the normal distribution.

Answer 8

In a two-tail test the null hypothesis is rejected if the test statistic falls in either the right hand or the left hand tail of the distribution.

Answer 9

oh yes, i was wondering though how you were able to tell whether this problem involved the one or two tail test? is it because it said the upper 10% and so that indicates it's a one tail test?

Answer 10

Yes. If there is no mention of the lower tail of the distribution it must be a one-tail test.

Answer 11

got it, thank you so much :)