The main reasons for this situation are: 1, the topic is too long, the whole topic is expressed in more than 500 words, and a lot of time is wasted just reviewing the topic. 2. Investigating the relatively unpopular knowledge point-normal distribution, which is not the focus of most schools. 3. Lots of data and calculation.
Probability statistics is an important part of high school mathematics and the key to the combination with college mathematics, so it will still be the focus of the exam in the future. From the trend, the test questions are more diverse and the test methods will be more flexible. However, the difficulty will be slightly reduced, at most equal to it.