A random sample of size n = 25 was drawn from a normally distributed population with known standard deviation=10 and the sample meanx=3.92 was determined.

What is the p-value of the hypothesisH0:=0 vs.H1:=0 ?

a) 0.03 b) 0.05 (correct solution but how to calculate?) c) 0.07 d) 0.09 e) 0.10