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  2. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    For B = 10% one requires n = 100, for B = 5% one needs n = 400, for B = 3% the requirement approximates to n = 1000, while for B = 1% a sample size of n = 10000 is required. These numbers are quoted often in news reports of opinion polls and other sample surveys. However, the results reported may not be the exact value as numbers are preferably ...

  3. Sub-sampling (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Sub-sampling_(chemistry)

    A riffle box is a box containing a number (between 3 and 12) of "chutes" - slotted paths through which particles of the sample may slide. The sample is dropped into the top, and the box produces two equally divided subsamples. Riffle boxes are commonly used in mining to reduce the size of crushed rock samples prior to assaying.

  4. Fort Worth Stock Show & Rodeo - Wikipedia

    en.wikipedia.org/wiki/Fort_Worth_Stock_Show_&_Rodeo

    Bull riding is considered to be "the most dangerous and surely the most exciting event of rodeos." [3] In 1932, NBC produced the first live broadcast of a rodeo as local station WBAP broadcast. [5] During World War II, the Fort Worth Stock Show introduced the first "half-time" rodeo performance, as Gene Autry made an appearance.

  5. Meet Fort Worth’s first PBR bull riding team. Here ... - AOL

    www.aol.com/news/meet-fort-worth-first-pbr...

    The Ariat Texas Rattlers will help kick off the Professional Bull Riders Team Series in Cheyenne, Wyoming, this week. The Fort Worth team will have a home stand at Dickies Arena Oct. 7 to 9.

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  7. Acceptance sampling - Wikipedia

    en.wikipedia.org/wiki/Acceptance_sampling

    MIL-STD-105E was cancelled in 1995 but is available in related documents such as ANSI/ASQ Z1.4, "Sampling Procedures and Tables for Inspection by Attributes". Several levels of inspection are provided and can be indexed to several AQLs. The sample size is specified and the basis for acceptance or rejection (number of defects) is provided. MIL ...

  8. Stratified sampling - Wikipedia

    en.wikipedia.org/wiki/Stratified_sampling

    Proportionate allocation uses a sampling fraction in each of the strata that are proportional to that of the total population. For instance, if the population consists of n total individuals, m of which are male and f female (and where m + f = n), then the relative size of the two samples (x 1 = m/n males, x 2 = f/n females) should reflect this proportion.

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