statistics
posted by Yadira M .
A random sample of n= 12 is drawn from a population that is normally distributed, and the sample variance is s©÷ = 19.3. Use ¥á = 0.025 in testing
¥Ç₀ : ¥ò©÷ ¡ 9.4 versus ¥Ç©û : ¥ò©÷ > 9.4

Yadira, Marianne, Laura, Vanessa, or whoever  please don't keep switching your name. We know that these statistics problems have been posted from the same computer  and presumably by the same person.

If you are in fact different persons, shouldn't you be helping each other? In any case, together with your course notes, there are sufficient examples for you to understand the subject.
I suggest you work out your next problems and post the results for checking.