EcoSmart is a manufacturer of compact fluorescent light (CFL) bulbs, which are fluorescent bulbs designed to be
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EcoSmart is a manufacturer of compact fluorescent light (CFL) bulbs, which are fluorescent bulbs designed to be more efficient than traditional incandescent bulbs. In an effort to produce a consistent product, suppose EcoSmart has a goal that the standard deviation for the life of its CFL bulbs is less than 500 hours. The standard deviation for the life of a random sample of 28 CFL bulbs was found to be 378 hours.
a. Using α = 0.05, perform a hypothesis test to determine if EcoSmart’s goal has been achieved.
b. Interpret the p-value.
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a H 0 2 250000 H 1 2 250000 b p value 00371 005 Reject H 0 ...View the full answer
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