An ecologist claims that because of environmental affects, the mean life of Louisiana shellfish is 27 months. Feeling the claim is too low, a congressman decides to test the ecologists claim at significance level of 5%. The congressman took random sample of 16 shellfish and found the mean life to be 28.05 months with standard deviation of 2.8.
Question: Do the sample results point out that the ecologist's claim is too low?