researcher will either use random assignment or matching What do random assignment and matching have in common? They are both designed to create equivalent groups of participants. Random assignment is to random selection as _____ is to _____
1 An unarmed guard from 21st Sentry Security in Dallas-Fort Worth typically costs $14 per hour, while an armed guard starts at $18 per hour. 2  The time of day also affects pricing. 3  Security guards working at a late-night party in the city may cost $30-$50 per hour, for example.
The Mac Pro Security Lock Adapter is available now in the Apple Online Store for $49. The adapter is not yet being offered for immediate pickup in Apple's retail stores, but will presumably be making its way to the company's stores around the world in the coming days.