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.
Our prices start at $75 per security camera install. We also include free mobile phone and tablet programming so you can watch your security cameras from anywhere (up to 15 mobile devices). We install 4, 8 and 16 security camera systems for homes, businesses and warehouses.