An important part of inferential statistics is hypothesis testing. As with learning anything related to mathematics, it is helpful to work through several examples. The following examines an example of a hypothesis test, and calculates the probability oftype I and type II errors. We will assume t...
13. 正确答案为 B,因为文中举的例子 "A candy bar makes a sick stomach feel better" 正是符合假设定义的。 14. 正确答案为 B,因为文中最后一段提到 "it" 指的是 "the hypothesis",即假设。 15. 正确答案为 B,因为文章主要内容是阐述科学方法的步骤和重要性。
If an individual wants to test that a penny has exactly a 50% chance of landing on heads, the null hypothesis would be that 50% is correct, and the alternative hypothesis would be that 50% is not correct. Mathematically, the null hypothesis is represented as Ho: P = 0.5. The alternativ...
TeachingHypothesis testingPowerSummary This article describes an example which is useful when teaching hypothesis testing in order to highlight the interrelationships that exist among the level of significance, the sample size and the statistical power of a test. The example also allows students to ...
false null hypothesis. ThePower of a Testis defined as1-β. A test with more Power is more desirable, as there is a lower probability of making a Type II Error. However, there is a tradeoff between the probability of making a Type I Error and the probability of making a Type II Error...
The Wald test is a test of hypothesis usually performed on parameters that have been estimated by maximum likelihood (ML). The null hypothesisWe assume that an unknown -dimensional parameter vector has been estimated by ML. We want to test the null hypothesis that equations (possibly nonlinear)...
In the domain of statistics, an inferential analysis is usually carried on a small representative sample drawn from a large population data as it is difficult to analyse a very large population data set. The hypothesis testing is carried out to ensure whether the ...
What are the assumptions we must satisfy when conducting a two-way, between-subjects ANOVA? What are the four assumptions of ANOVA? In hypothesis testing, what is the difference between a two-sample t-test and ANOVA hypotheses test...
The complexity and variability of environmental systems, the scarcity of appropriate observations and experiments, problems in the interpretation of empirical data, and the lack of a well established theoretical background make it difficult to test any possible conceptualization, or hypothesis, describing ...
(note:textbook exercises Using the data and model of Example , carry out a test of the hypothesis that the three aggregate price indices are not significant determinants of the demand for gasoline.相关知识点: 试题来源: 解析 答:P值小于,拒绝pn、ps、pd前的系数相等的原假设,说明这三个价钱的自然...