Norm-Referenced vs. Criterion-Referenced Tests. Norm-referenced tests are specifically designed to rank test takers on a âbell curve,â or a distribution of scores that resembles, when graphed, the outline of a bellâi.e., a small percentage of students performing well, most performing average, and a small percentage performing poorly.
1 7:45 a.m. : The family leaves the house and the thermostat is set to 56Â°F. 2  By turning their thermostat back 10Â° to 15Â° for 8 hours, the family can save 5% to 15% a year on their heating bill -- a savings of as much as 1% for each degree if the setback period is eight hours long.
The ideal time to set back your thermostat is when you are sleeping or away from home. When considering what should the thermostat be set at, remember that cranking up the dial further than your desired temperature wonât make the house heat up or cool down any quicker, and is very inefficient.