Question: Thequality-control manager at a compact fluorescent light bulb(CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to

Thequality-control manager at a compact fluorescent light bulb(CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,463 hours. The population standard deviation is 100 hours. A random sample of 64 light bulbs indicates a sample mean life of 7,438 hours.

Let be the population mean. Determine the nullhypothesis, H0, and the alternativehypothesis, H1.

H0: =7463

H1: 7463

What is the teststatistic?

^ZSTAT⁼ -2

What is/are the critical value(s)?

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