T Distribution

[raheelkhosa]

a. In terms of GPA, did the program work? State the Null Hypothesis. Will you reject or
accept the Ho? What is your research hypothesis?

Systemwide GPA Program GPA
µ= 2.47 x̄ = 2.55
S=0.70
N=35

=2.55-2.47/0.120
=0.67 (t obtained).
i am not sure where to get t critical.

[bukharin]

First you need to figure out the degrees of freedom. Then you find the critical value of t, for that df, in a table of the t distribution (often in the back of your stats textbook, or see here)