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The Victorian Tertiary Admissions Centre (VTAC) adjusts all VCE study scores to equalise results between studies with stronger cohorts, and those with weaker ones. Contrary to common perception, scaling is not based on the difficulty of the subject, as each study score is in fact a ranking.
For instance, a score in the first dimension that is close to either pole means that such score is located at one of the extremes in the liberal-conservative scale. So, a score closer to 1 is described as conservative whereas a score closer to −1 can be described as liberal. Finally, a score at zero or close to zero is described as moderate.
VTAC then scaled the Subject Study Scores to allow for cross-study calculations - that is, the Study Scores were adjusted up or down to take into account the strength of competition amongst the cohort of students studying the subject that year. Scaling was undertaken to ensure that each subject contributes equally to the ENTER.
In addition, grading scales at university-level institutions have changed frequently. Grading scales can be 1 to 8, 1 to 4, or A through G, where A is on a 4.0 scale or on a 5.0 scale. The most common scale is now 1 to 7, with 9 being the highest grade obtained. In addition, degrees are awarded in a Class, depending on the grades received.
The reason for the choice of the number 21.06 is to bring about the following result: If the scores are normally distributed (i.e. they follow the "bell-shaped curve") then the normal equivalent score is 99 if the percentile rank of the raw score is 99; the normal equivalent score is 50 if the percentile rank of the raw score is 50;
Study scores are calculated according to a normal distribution, where the mean is 30 and the standard deviation is 7, with most study scores falling in the range 23 to 37, and a study score of 40 or more places a student in the top 9% of all students in that subject. [21] This statement is also given in the bottom section with the following table:
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The Jadad scale, sometimes known as Jadad scoring or the Oxford quality scoring system, is a procedure to assess the methodological quality of a clinical trial by objective criteria. It is named after Canadian - Colombian physician Alex Jadad who in 1996 described a system for allocating such trials a score of between zero (very poor) and five ...