In an interesting study by a tobacco company they found that the mean age when smokers first start to smoke varies in each generation. However, the standard deviation of that age remains constant of around 1.6 years. A survey of 45 smokers of the current generation was done to test if the mean age for starting to smoke is at least 21. The sample mean was 20.5 with a sample standard deviation of 1.5. Do the data support the claim at the 1% level? Round decimals to 2 places, unless asked otherwise. d. What test are we using (Answer Z-test or t-test in the blank): e. What is the value of the test-statistic? f. What is the critical value? g. What is your final decision? (write "reject Ho" or "fail to reject Ho" in the blank):

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