The Quality Control Manager at a Cell Phone Battery Factory

question 44

Multiple Choice

The quality control manager at a cell phone battery factory needs to determine whether the mean life of a large shipment of batteries is equal to the specified value of 375 hours. The process standard deviation is known to be 100 hours. A random sample of 64 batteries indicates a sample mean of 350 hours.
-The p-value is _____.

• A)0.0001
• B)0.0002
• C)0.0228
• D)0.0456
• E)-0.0228