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.
Standard scores indicate where your score lies in comparison to a norm group. For example, if the average or mean score for the norm group is 25, then your own score can be compared to this to see if you are above or below this average.Percentile Scores. A percentile score is another type of converted score.Your raw score is converted to a number indicating the percentage of the norm group who scored below you. For example, a score at the 60th percentile means that the individual's score is the same as or higher than the scores of 60% of those who took the test.tandard scores indicate where your score lies in comparison to a norm group. For example, if the average or mean score for the norm group is 25, then your own score can be compared to this to see if you are above or below this average. Percentile Scores. A percentile score is another type of converted score.