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Metal detectors at airports are used to determine whether passengers are carrying weapons. If the null hypothesis states that a passenger isn't carrying a weapon, a type I error would occur whenever
A) a weapon-free passenger passes the detector without activating the alarm.
B) a weapon-free passenger passes the detector and activates the alarm.
C) a weapon-carrying passenger passes the detector without activating the alarm.
D) a weapon-carrying passenger passes the detector and activates the alarm.
John Kim is the purchasing manager for your computer, Inc., a manufacture of network servers. A truckload of sheet metal has just arrived. Previous experience with the supplier suggests that the thickness of the sheet metal follows a normal distri..
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