Everyone must wear medical grade gloves in a sterile field. A sterile field is usually used during surgery. A sterile syringe and vial of medication. Surgical hand scrubs remove most bacteria from the skin before gloves are put on.
Standard score. In statistics, the standard score is the signed number of standard deviations by which the value of an observation or data point is above the mean value of what is being observed or measured. Observed values above the mean have positive standard scores, while values below the mean have negative standard scores. The standard score is a dimensionless quantity obtained by subtracting the population mean from an individual raw score and then dividing the difference by the population standard deviation.
A score of 68 to 70 would be in the 2nd percentile, a score of 71 or 72 would be in the 3rd percentile, 73 and 74 or in the 4th percentile, etc. This pattern continues, and a score of 133 to 150 places children in the 99th percentile. o 3 Locate your child's raw score on the score report.The raw score is simply the number of NNAT questions answered correctly. Raw scores can be converted to scaled scores and normed by the child's age. Norm referencing is just a further way to compare children, based on their age at the time of the test. 3 Locate your child's raw score on the score report. The raw score is simply the number of NNAT questions answered correctly. Raw scores can be converted to scaled scores and normed by the child's age.