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.
Find out how your PSAT/NMSQT and PSAT 10 scores are calculated and what those scores mean. Because thereâs no penalty for guessing, your raw score is the number of questions you answered correctly. Raw scores are converted to scores on a scale of 160 to 760 using a process called equating. Equating adjusts for slight differences in difficulty between various versions of the test (such as versions taken on different days).