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 average security camera price across the nation ranges between $950 & $1,585. Security cameras on their own, without the software or professional installation, start at $100. Many security cameras come in packages & average to advanced surveillance camera packages can cost upwards of $1,600.