Posted by Stephanie on Saturday, March 29, 2008 at 10:37pm.
You can reject Ho if p ≤ .05, which means that the results you have found would happen by chance 5% of the time or less. P > .05 means that there is a greater than 5% probability that the results were due to chance. Under those conditions, I would not reject the Ho.
Since I have not worked in the area for some time, for your last question, I searched Google under the key words "t-test significance one-tailed 'degrees of freedom'" to get these possible sources:
http://www.psychstat.missouristate.edu/introbook/sbk25.htm
http://www.bized.co.uk/timeweb/crunching/crunch_experiment_reviewb.htm
http://books.google.com/books?id=2oEQyOIyCbUC&pg=RA1139-PA2&lpg=RA1139-PA2&dq=%22t+test%22+significance+%22one+tailed%22+%22degrees+of+freedom%22&source=web&ots=hJ038C041Z&sig=KfJKzwtnGcQEtpchFKHTdV13Mio&hl=en
http://www.bized.co.uk/timeweb/crunching/crunch_experiment_reviewb.htm
http://books.google.com/books?id=2oEQyOIyCbUC&pg=RA1139-PA2&lpg=RA1139-PA2&dq=%22t+test%22+significance+%22one+tailed%22+%22degrees+of+freedom%22&source=web&ots=hJ038C041Z&sig=KfJKzwtnGcQEtpchFKHTdV13Mio&hl=en
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.