How to find out P values for T tests

tkthustler

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Joined
Sep 24, 2006
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17
I'm fine doing the "Critical Value" approach but I can't figure out for the life of me how to do the P value approach. For example.

Ho: u <(or = to) 50
Ha:u > 50


x=51.05
Sample Standard Dev. =14.2
alpa=.05
n=25

When I compute my test statistic I get t=.3697 so I compare that to the value I found in the t table under the .05 alpha level and 24 degrees of freedom and I get 1.7109. So .3697 is less than 1.7109 and we do not reject ho. This is what my teacher calls the Critical value approach.

That part I understand but then for the answer section of the p value approach he has:

Since p-value (.35, .45) >(or = to) alpa we do not reject ho.

Where does he get these 2 numbers .35 and .45. I'm guessing it's somewhere on the table but I have no idea and I can't figure it out. Any help would be greatly appreciated.
 
Hint: When you look up 0.3697 in the body of the table, to what values of alpha does it correspond?
 
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