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.
Based on the number and type of each investigation, the weighted average cost is about $1230 per investigation. The total cost of a security clearance includes the investigation, adjudication, and front-end processing and maintenance costs. The cost of investigations is published by OPM.