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.
Report Abuse. Generally, security companies charge 30 to 50 dollars an hour, despite the fact that the guards salary is only 12 dollars usually. The other fess cover the other costs like insurance and general rent fees. KT Â· 4 years ago.