Michael Hetz1, Julius Rosch2, Thomas Unger3

  • 1Department of Operative Medicine (DOPM), Clinic and Polyclinic for Orthopedics, Trauma Surgery and Plastic Surgery, University Hospital Leipzig, Liebigstr. 20, 04103, Leipzig, Germany. Michael.Hetz@medizin.uni-leipzig.de.

概括

培训显著提高了收集技术数据的准确性和速度,用于预测汽车事故伤害. 这提高了医院前评估和紧急服务的信息中继,无论其专业背景如何.

相关概念视频

Introduction to Test of Independence01:21

Introduction to Test of Independence

In statistics, the term independence means that one can directly obtain the probability of any event involving both variables by multiplying their individual probabilities. Tests of independence are chi-square tests involving the use of a contingency table of observed (data) values.
The test statistic for a test of independence is similar to that of a goodness-of-fit test:
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Determination of Expected Frequency01:08

Determination of Expected Frequency

Suppose one wants to test independence between the two variables of a contingency table. The values in the table constitute the observed frequencies of the dataset. But how does one determine the expected frequency of the dataset? One of the important assumptions is that the two variables are independent, which means the variables do not influence each other. For independent variables, the statistical probability of any event involving both variables is calculated by multiplying the individual...
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Hypothesis Test for Test of Independence01:16

Hypothesis Test for Test of Independence

The test of independence is a chi-square-based test used to determine whether two variables or factors are independent or dependent. This hypothesis test is used to examine the independence of the variables. One can construct two qualitative survey questions or experiments based on the variables in a contingency table. The goal is to see if the two variables are unrelated (independent) or related (dependent). The null and alternative hypotheses for this test are:
H0: The two variables (factors)...
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