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.
Or you could turn to the web and buy the security cameras and accessories yourself. How Much it Will Cost: Do-it-yourselfers can expect to pay anywhere from $300-$750 for cameras that you'd have to install yourself. You might even consider using a home security system if your place of business doesn't have a large square footage.