There are abnormalities in the exam scores of Dien Bien, Kon Tum, and Lai Chau.

"The goal of cheating on exams is to increase scores for university entrance exams, if not for other purposes, and to increase scores for a large number of candidates (about 1% or more - Ha Giang is 2%). With these assumptions, cheating on exams on a large enough scale will reduce the number of low-scoring exams and increase the number of high-scoring exams, leading to a significant increase in the rate of high-scoring exams," Mr. Tung said.

Analyzing all 2018 high school exam data (about 1 million candidates with more than 5 million exams), Mr. Tung identified some unusual signs in some places.

Analyzing the high score test rate for the 3 main blocks, including only multiple choice subjects for blocks A, A1 and B; Mr. Tung divided it into 3 high score levels: 24, 25.5 and 27 corresponding to the average score of each subject being 8, 8.5 and 9.

"You should only choose from 8 points or higher because in multiple choice tests, a score of 7 is not considered high. A score of 7 in multiple choice tests is only equivalent to a score of 6 in essay tests (the candidate gets 6 points + 1 point from the remaining 4 points randomly)."- Mr. Tung explained.

- First of all, about block A. The 3 graphs (figure 1, figure 2, figure 3) show the percentage of candidates achieving 24, 25.5 and 27 or higher for the whole country and 63 provinces and cities.

The horizontal red line is the national level. Through the graph, it is clear that Ha Giang is a locality with a very high rate in all 3 thresholds.

Some "educational" localities also have higher than average rates.

But in this block, two provinces Kon Tum and Dien Bien appeared. Meanwhile, with the graph for 27 points or more, Hoa Binh is the province that appeared and was just mentioned by the press.

In block A1 (picture 3, picture 4), Ha Giang is still a prominent locality, however in this exam block, Lai Chau province has appeared and emerged two places: Son La and Hoa Binh.

Thus, for block A1, the Top 4 localities with the highest percentage of candidates with 25.5 points or more nationwide are Ha Giang, Lai Chau, Hoa Binh, Son La in order. The Top 3 localities with the percentage of candidates with 27 points or more are Ha Giang, Son La, Hoa Binh.

In block B (figure 5, figure 6), Kon Tum and Dien Bien are taking the championship in the percentage of candidates with high scores.

These are the two localities with the highest percentage of block B candidates scoring 24 points or more.

Meanwhile, in this exam group, the localities with the highest percentage of candidates with 25.5 points or more are Ha Giang, Lai Chau, Kon Tum and Dien Bien. At the score level of 27 points or more, the localities with the highest percentage of candidates with 27 points or more are Dien Bien, Ha Giang, Kon Tum and Son La.

According to Mr. Tung, if we analyze the test scores for each subject, the abnormalities will be demonstrated more specifically.

"So now Ha Giang has been announced by the Ministry of Education and Training to have violations, standing out in all three groups A, A1, B. Son La appears in group B, A1 is being inspected by the Ministry. Hoa Binh province has been mentioned in the press for irregularities in exam scores. It is necessary to consider Lai Chau province (appearing in group A1 and group B); Kon Tum, Dien Bien (looming in group A and really standing out in group B)" - Mr. Tung suggested.

As for the two localities of Lao Cai and Bac Lieu, Mr. Tung said that through analysis, there were no outstanding signs here, so if there were any, they would only be on a small scale.