SOLUTION: A company manufactures light bulbs and wants to advertise a me an life of 1200 hours for the light bulbs. To support this, the company random samples of 36 light bulbs are periodic

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Question 870675: A company manufactures light bulbs and wants to advertise a me an life of 1200 hours for the light bulbs. To support this, the company random samples of 36 light bulbs are periodically tested. If the t values fall in the 90% confidence interval for the population, the company will be satisfied that it is manufacturing acceptable light bulbs. The mean of the sample is found to be 1178 hours and the standard deviation is 35 hours. Can the company advertise a mean life of 1200 hours; are they making acceptable light bulbs? Explain your reasoning
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
90% CI,
mean = 1178, SD = 35
n = 36
= 22/35/6 = 3.77
p-value(t≤ 3.77) = .9997 , DF 34
Sample does not demonstrate that 1200 mean life criteria is met