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.
ADT home security typically costs $99 upfront. They donât charge an âup-front feeâ for their standard equipment package; however, there is an installation cost of ($99). Itâs important to note this fee may vary depending on the type of monitoring selected, current promotions, and the rates of your local ADT rep or Authorized dealer.