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0.05, is the data highly inconsistent with the claim? 75. From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that age remains constant of around 2.1 years. A survey of 40 smokers of this generation was done to see if the mean starting age is at least 19. The sample mean was 18.1 with a sample standard deviation of 1.3. Do the data support the claim at the 5% level? 76. The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a