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.
At this point the cost of a security system doesn't vary much between hardwired and wireless options. Home security systems carry monthly monitoring fees which are usually locked in for three to five year contracts. Equipment warranties can add a few dollars per month. $99 installation, $35.99 per month for ADT security system through Security Choice..  2  ADT Honeywell Lync system with door and window and motion detectors. 3  $99.00 installation and $35.99 a month..  4 We got our system installed for $99.