from generation to generation, the mean age when smokers first start to smoke was believed to be 17. A survey of 40 smokers of the millenial generation was done to see if the mean starting age is now different. The sample mean is 18.1 with a sample standard deviation of 1.3 Do the data support that the starting age is now different at the 5% level? Construct a 95% confidence interval for the true age and interpret it