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.
Security Guard Salary. (United States). Security Guards in the United States take home an average $10.42 per hour. Compensation ranges from $8.47 per hour on the lower end to $14.97 on the higher end. While the company and tenure impact pay for this group, geographic location is the most influential factor.