Both t value and p value are used to judge whether it is statistically significant. The p value is the minimum alpha value that rejects the original hypothesis. Write out the statistics, bring them in for calculation, and then calculate the P value according to the distribution of the statistics. P value is a parameter used to determine the hypothesis test results, and it can also be compared by using the rejection domain of distribution according to different distributions. It was first put forward by R A fisher.

Fisher's specific approach is:

Suppose the value of a parameter. Select a test statistic (such as Z-statistic or Z-statistic). When the assumed parameter is true, its distribution should be completely known. Select a random sample from the research population, calculate the value of the test statistic, and calculate the significance level of the probability p value or the observed value, that is, the probability that the test statistic is greater than or equal to the actual observed value under the premise of being true.

It is of great significance to guide the writing of graduation thesis;

(1) Graduation thesis is a summative independent assignment of candidates, which aims to summarize the achievements of learning major and cultivate the ability to solve practical problems by comprehensively applying what they have learned. Stylistically speaking, it is also a meaningful essay for scientific research and exploration of practical or theoretical problems in a certain professional field. The writing of graduation thesis can be divided into two steps, namely, topic selection and research topic.

(2) After selecting the topic, the next task is to study the topic. The general procedure of the research topic is: collecting materials, researching data, clarifying arguments, selecting materials, and finally writing, revising and finalizing.

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