Question 1182426: Give complete computation/solutions and 6 steps in solving.
1.A firm that manufactures tires would like to determine whether the machine that produces these tires is still in good condition. The average diameter of these tires should be 36 inches to fit most of the car models. To check the machine, a sample of 100 tires were measures and showed a mean diameter of 36.8 inches with standard deviation of 1.83 inch. Should the manufacturer change the machine? Use a 10% level of significance.
2. A cigarette manufacturer claims that the average nicotine content of their cigarette does not exceed by 3.4 mg. A random sample of 15 cigarettes was taken and found to have average nicotine content of 4.5 mg with SD of 1.5 mg. Are you going to accept the manufacturerā€™s claim at 0.01 level of significance?
3. A manufacturer packs sugar into plastic bags . Each bag is to hold 5 kgs whenever the production is under control. At one period, a sample of 17 bags was taken to check the process and was to found to weigh 5.6 kgs with SD of 0.75 kgs. Is the manufacturing process under control? Use š¯›¼=0.01.
Thanks in advance!
Answer by ikleyn(52781)   (Show Source):
You can put this solution on YOUR website! .
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