From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of the age when smokers first start to smoke remains constant at around 2.6 years. The American Lung Association claims that the mean age when smokers first start to smoke is 17. A survey of 37 randomly selected smokers of this generation was done and it was found that the mean age when smokers first started to smoke was 16.8. Is there enough evidence to reject the claim at the 5% level of significance? Use the P-value method.