# simple statistic : Hypothesis test

• Feb 19th 2010, 06:23 PM
nameck
simple statistic : Hypothesis test
hey there...
regarding the example on the attachment..
how am i going to solve it using p value test..?
because, i cant find t = 2.4 in the t distribution table..
• Feb 19th 2010, 07:00 PM
o_O
A few things:

#4: Your critical region is correct but the formula you have for \$\displaystyle t\$ on the same line is used to calculate the test statistic, not the critical value. The critical value is obtained from your table.

#5: The formula for \$\displaystyle s\$ is actually unnecessary seeing how you're given the sample standard deviation.

Now for your question. Just using tables, you won't be able to find the precise P-value that corresponds to your test statistic. The best thing you can do with the t-test is to give it bounds.

If you look in your table, notice that \$\displaystyle t = 2.4\$ (df = 15) falls in between \$\displaystyle t = 2.249\$ and \$\displaystyle t = 2.602\$ which corresponds to p-values of 0.2 and 0.1 respectively (remember, this is just the upper tail so don't forget to adjust your bounds seeing how this is a two-tailed test).

This should give you the necessary information to either reject or fail to reject the null hypothesis.
• Feb 19th 2010, 08:52 PM
nameck
got it!!! Thanks!! (Rofl)