Given a simple random sample of size n = 18 from a Normal population with mean and standard deviation , we test the hypotheses against at the 5% significance level. If is unknown, and the observed value of the test statistic is -2.08, determine the result of the test.

a The test rejects H0 in favour of H1

b The test does not reject H0 in favour of H1

c More information is required to determine the result of the test