1. An employment information service claims the mean annual pay
for full-time workers without a high school diploma is less than
$19,100. The annual pay for a random sample of 8 full-time non-high
school graduates is listed below. Salaries for people without high
school diplomas are normally distributed. Based on this
information, you decide to
18,165            
16,012            
18,803            
19,864
17,328            
21,445            
19,237            
18,316
2. A company that makes cola drinks states that the mean
caffeine content per one 12-ounce bottle...