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  • Null Hypotheses| Alternative Hypotheses|Hypothesis Test|Significance Level|two tailed |one tailed|

    9.1 The Nature of Hypothesis Testing

    Over the years, however, null hypothesis has come to mean simply a hypothesis to be tested.

    Null Hypothesis:

    H0: μ = μ0,

    where μ0 is some number

    Alternative Hypothesis:

    two tailed 实例:

    one tailed 实例:

     评判标准:

    Type I and Type II Errors:

    Significance Level

     

     

     所以需要balancing

    In other words, if we do not reject the null hypothesis, we conclude only that the data do not provide sufficient evidence to support the alternative hypothesis; we do not conclude that the data provide sufficient evidence to support the null hypothesis

     

    即,reject or not reject 取决于是否满足备择假设,如果满足备择假设则reject;如果不满足备择假设则 not reject

    When the null hypothesis is rejected in a hypothesis test performed at the significance level α, we frequently express that fact with the phrase “the test results are statistically significant at the α level.” Similarly, when the null hypothesis is not rejected in a hypothesis test performed at the significance level α, we often express that fact with the phrase “the test results are not statistically significant at the α level.”

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  • 原文地址:https://www.cnblogs.com/yuanjingnan/p/11262657.html
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