The lifespan of xenon metal halide arc-discharge bulbs for aircraft landing lights is normally distributed with a mean of 1,800 hours and a standard deviation of 430 hours. (a) If a new ballast system shows a mean life of 2,260 hours in a test on a sample of 8 prototype new bulbs, would you conclude that the new lamp’s mean life exceeds the current mean life at α = 0.02?  No Yes  (b) What is the p-value? (Round your answer to 4 decimal places.) p-value

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The lifespan of xenon metal halide arc-discharge bulbs for aircraft landing lights is normally distributed with a mean of 1,800 hours and a standard deviation of 430 hours.
 
(a) If a new ballast system shows a mean life of 2,260 hours in a test on a sample of 8 prototype new bulbs, would you conclude that the new lamp’s mean life exceeds the current mean life at α = 0.02?
 

  • No
  • Yes


 
(b) What is the p-value? (Round your answer to 4 decimal places.)
 
p-value            

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