Simply put, it is a test paper with a score of 100. It is estimated that the average branch is roughly between 70 and 75.

The calculation formula of the difficulty coefficient is: P= average score ÷ full score.

Example: Full marks for multiple-choice questions. 1 is 4, and 20 of the 50 students in the class answered correctly, so the difficulty calculation of the question number 1: average score =4×20÷50= 1.6, P= average score ÷ full score = 1.6 \

It is generally believed that the difficulty index of the test questions is between 0.3 and 0.7, and the average difficulty index of the whole test paper is preferably around 0.5, and there should not be too many questions above 0.7 and below 0.3.

average number

Is an important concept in statistics. The average in primary school mathematics generally refers to the arithmetic average, that is, the quotient obtained by dividing the sum of a set of data by the number of this set of data. In statistics, arithmetic mean is often used to represent the overall level of statistical objects, and it is a statistic that describes the position in the data set. It can be used not only to reflect the general situation and average level of a group of data, but also to compare the data of different groups and see the differences between groups.

Reference to the above content: Baidu Encyclopedia Average