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.
There are different packages available, depending upon the specific needs of the member. The classic package includes only the Life Alert button and the Master Unit (the 2-way speaker). The monthly monitoring fee is $29.95.Life Alert has additional protection packages to suit one's needs regardless of living situation. These packages may include a monitored smoke detector, a monitored carbon monoxide detector and two types of emergency cell phones, which provide mobile protection on the go.The monthly monitoring fees for these packages range between $29.95-$59.95. It is recommended to call Life Alert for a quote.here are various costs. Study materials are anywhere from $100 - $200. A pre-exam course if you choose to take one or if your state requires one, The exam is another $100 +/- â¦ Then there is the cost of the license in your state.