Equivalent score refers to the conversion of the current year's college entrance examination results into previous years' scores, so as to facilitate the comparison of admission situation and difficulty in different years. There are two main ways to convert equivalent points:
1. One is to convert according to the rank according to the table of points and paragraphs. The principle of this method is that the scores of the same position in different years are equivalent, for example, the scores of the 1000th place in 2017 and the 1000th place in 2016 are equivalent. The specific steps are:
1. Find the one-point and one-paragraph table of the current year and find the position corresponding to your score, for example, the position corresponding to the 600 score in 2017 is 3500.
2. Find the score of the same or similar rank in the previous year, for example, the score corresponding to the 3500 students in 2016 is 618 points.
3. Get the equivalent score of previous years, that is, 618 points in 2016 is the equivalent score of 600 points in 2017.
Second, the other is to convert according to the standard division method according to the normal distribution. The principle of this method is that the scores of different years can be converted into standard scores, i.e. compared to the population mean and standard deviation, and then the corresponding equilibrium and equivalent scores can be determined according to the normal distribution table. The specific steps are:
1. Calculate the standard score of the current year, that is, subtract the overall mean of the current year from your own score, and then divide it by the overall standard deviation of the current year to get a dimensionless value, for example, the standard score of 2017 is 12。
2. Find the normal distribution table and find the equivalence corresponding to the standard score, that is, the proportion of the number of people with scores higher than themselves under the normal distribution, for example, the allele in 2017 is 08849。
3. Calculate the equivalent score of previous years, that is, use the overall mean of previous years plus the overall standard deviation of previous years multiplied by the standard score corresponding to the equilibrium to obtain a dimensional value, for example, the equivalent score in 2016 is 6178。
The above is the concept and conversion method of equivalent points, I hope it will be helpful to you. If you have any other questions, please feel free to continue to consult me.