I'm certain that there's not a statistically-significant value, but for this question we need to actually provide the probability.

I'd just like confirmation that I'm doing this right -- I'm a little confused that we were given the population standard deviation when I don't think it's necessary:

Calculate the t-statistic: (5.34 - 5.27) / (.28 / sqrt(16) ) = 1

Calculate the probability: .3332

(To go from t-statistic to probability, I'm using: http://www.graphpad.com/quickcalcs/pvalue1.cfm -- not sure how to do it with OpenOffice or Excel)

Is that the correct way to do this and the correct answer?