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  2. Hosmer–Lemeshow test - Wikipedia

    en.wikipedia.org/wiki/Hosmer–Lemeshow_test

    Compare the computed Hosmer–Lemeshow statistic to a chi-squared distribution with Q − 2 degrees of freedom to calculate the p-value. There are Q = 10 groups in the caffeine example, giving 10 – 2 = 8 degrees of freedom. The p-value for a chi-squared statistic of 17.103 with df = 8 is p = 0.029. The p-value is below alpha = 0.05, so the ...

  3. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    The table shown on the right can be used in a two-sample t-test to estimate the sample sizes of an experimental group and a control group that are of equal size, that is, the total number of individuals in the trial is twice that of the number given, and the desired significance level is 0.05. [4]

  4. Dongfeng Automobile Company - Wikipedia

    en.wikipedia.org/wiki/Dongfeng_Automobile_Company

    Dongfeng Automobile Co., Ltd. (abb. DFAC) is a Chinese automobile company based in Xiangyang, Hubei. It is a subsidiary of Dongfeng Motor Co., Ltd. (DFL) which is a joint venture of Dongfeng Motor Group (DFG) and Nissan .

  5. Sampling distribution - Wikipedia

    en.wikipedia.org/wiki/Sampling_distribution

    In statistics, a sampling distribution or finite-sample distribution is the probability distribution of a given random-sample-based statistic.If an arbitrarily large number of samples, each involving multiple observations (data points), were separately used to compute one value of a statistic (such as, for example, the sample mean or sample variance) for each sample, then the sampling ...

  6. Design effect - Wikipedia

    en.wikipedia.org/wiki/Design_effect

    If the sample size is 1,000, then the effective sample size will be 500. It means that the variance of the weighted mean based on 1,000 samples will be the same as that of a simple mean based on 500 samples obtained using a simple random sample.

  7. Frequency selective surface - Wikipedia

    en.wikipedia.org/wiki/Frequency_selective_surface

    As an example of how to use FSS equivalent circuits for quick and efficient design of a practical filter, we can sketch out the process that would be followed in designing a 5-stage Butterworth filter (Hunter [2001], Matthaei [1964]) using a stack of 5 frequency selective surfaces, with 4 air spacers in between the FSS sheets.

  8. Dongfeng EV400 - Wikipedia

    en.wikipedia.org/wiki/Dongfeng_EV400

    The Dongfeng EV400 or DFAC Captain EV400 is an electric light, commercial logistics van designed and produced by the Chinese automaker Dongfeng Automobile Company since 2018. [ 1 ] Overview

  9. DFAC - Wikipedia

    en.wikipedia.org/wiki/DFAC

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