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相关概念视频

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The Wald-Wolfowitz runs test, commonly referred to as the runs test, is a nonparametric test used to assess the randomness of ordered data. The test evaluates the number of runs, which are consecutive sequences of similar elements within the data. If the number of runs is significantly higher or lower than expected, the data is considered non-random, indicating a detectable pattern or structure.
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The Wald-Wolfowitz test, also known as the runs test, is a nonparametric statistical test used to assess the randomness of a sequence of two different types of elements (e.g., positive/negative values, successes/failures). It examines whether the order of the elements in a sequence is random or if there is a pattern or trend present. This nonparametric test applies to any ordered data despite the population and sample data distribution, even if a higher sample size is available.
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When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Method validation is a crucial process in analytical chemistry designed to confirm that a given method consistently produces reliable and high-quality results. This process is essential when a method is applied to different sample matrices or when procedural modifications are made, ensuring that the results meet acceptable standards across various applications.
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The Anderson-Darling test is a statistical method used to determine whether a data sample is likely drawn from a specific theoretical distribution. Unlike parametric tests, it does not require assumptions about specific parameters of the distribution. Instead, it compares the sample's empirical cumulative distribution function (ECDF) with the cumulative distribution function (CDF) of the hypothesized distribution. Critical values for the test are specific to the chosen distribution rather...
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沃特卢差分敏度测试 (WatDAT) - 可测试性和规范性数据

S Aryal1, E L Irving1, L W Christian1

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概括
此摘要是机器生成的。

与其他方法相比,WatDAT House/Circle (HC) 在测量幼儿视力敏度 (VA) 方面表现出更高的可测试性. 在18-47个月的儿童中,视力敏度随着年龄的增长而改善.

关键词:
儿科 optometry 视光学 在儿童视光学方面可测试性 可测试性视力敏度 视力敏度 视力敏度视觉发展 视觉发展视觉发展

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科学领域:

  • 眼科医生 眼科 眼科
  • 儿科光学测量 儿科光学测量
  • 视觉科学 视觉科学 视觉科学

背景情况:

  • 准确的视力敏度 (VA) 评估在幼儿中对于早期发现视力障碍至关重要.
  • 测量幼儿和学龄前儿童VA的现有方法可能是具有挑战性的,因为合作和注意力跨度.
  • WatDAT (视觉敏度测试) 是一种新的工具,旨在评估这一年龄组的识别VA.

研究的目的:

  • 评估WatDAT House/Circle (HC) 和WatDAT Faces用于测量18至48个月龄的儿童的识别视敏度 (VA) 的可测试性.
  • 收集与这个年龄段儿童的初步年龄相关的VA数据.
  • 为了比较WatDAT的可测试性和性能,商业上有两个匹配的视力敏度测试:Patti Pics和Kay Pictures.

主要方法:

  • 一组57名儿童 (18.5-45.8个月) 参加了两个测试会.
  • 根据病史和早产,儿童被分为典型 (n=46) 和非典型 (n=11) 组.
  • 双眼和单眼VA使用WatDAT HC和WatDAT Faces进行评估;双眼VA也使用Patti Pics和Kay Pictures进行评估. 记录了可测试性 (完成测试的百分比) 和VA.

主要成果:

  • 在典型儿童中,WatDAT HC实现了对双眼镜测试的最高可测试性 (96%),其次是WatDAT Faces (86%),Kay Pictures (80%),Patti Pics (75%).
  • 沃特达特HC显示测试能力明显优于帕蒂图片和凯图片 (p=0.03).
  • 在所有测试措施中,视力敏度随着年龄的增加而改善,WatDAT HC和WatDAT Faces之间的双眼VA没有显著差异 (p=0.07).

结论:

  • WatDAT HC在幼儿中表现出色的可测试性,表现优于Patti Pics和Kay Pictures,特别是在较年轻的年龄组.
  • WatDAT HC是评估幼儿和学龄前儿童视力敏度的可行和有效工具.
  • 这项研究证实,视敏度测量在18至47个月的儿童中随着年龄的增长而改善.