"What maintenance policy should be followed when changing light bulbs at major sporting event stadiums?" If the light bulbs are changed only when they burn out, it is quite costly to dispatch crews to change only one bulb at a time. This method also requires someone to report the problem, and in the meantime, while unreported, the light bulb is "out." However, if each bulb lasts approximately the same amount of time, all the bulbs can all be replaced "all at once" periodically (in mass), producing significant cost savings for the maintenance department. Suppose a cost-benefit analysis of light bulb replacement at the Camping World Stadium in Orlando concludes it will be beneficial to replace all the light bulbs at the same time if and only if the STANDARD DEVIATION of the lives of all the light bulbs in the stadium is SIGNIFICANTLY LESS THAN 15 hours. You conduct a study and record the length of life of the last 100 bulbs changed at Camping World Stadium in Orlando. Conduct an appropriate hypothesis test to evaluate your data and answer the questions posed below. Use a 5% level of significance (Alpha = 0.05) for your hypothesis test.

What is the p-value of your hypothesis test?

Change bulbs all at once, or when they go out?

Explain (as briefly as possible) "Why?" you marked the green-shaded box you marked in part b above. Include in your discussion whether you decided to REJECT or NOT REJECT the null hypothesis of your hypothesis test as well as whether you might possibly be making a Type I or Type II error in you decision.

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