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Updated: Jul 18, 2026

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在三个国家公共使用数据集中,比较了受伤的自行车骑行者和摩托车骑行者的酒精参与

Kathryn G Burford1, Andrew G Rundle2, Spiros Frangos3

  • 1Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, New York.

Traffic injury prevention
|June 26, 2024
PubMed
概括

酒精显著影响致命和非致命伤害的摩托车和踏板车骑手. 来自三个国家数据集的数据显示,酒精参与率各不相同,强调需要标准化监测,以改善伤害预防工作.

关键词:
伤害受伤的情况酒精 酒精 酒精 酒精 酒精 酒精 酒精 酒精一个骑自行车的人.骑自行车的人骑自行车.骑摩托车的人.监控监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督监督

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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:
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)...
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...