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  2. Coupon - Wikipedia

    en.wikipedia.org/wiki/Coupon

    Coupons can be used to research the price sensitivity of different groups of buyers (by sending out coupons with different dollar values to different groups). Time, location and sizes (e.g. five pound vs. 20 pound bag) [12] affect prices; coupons are part of the marketing mix. [13] So is knowing about the customer. [14] [12]

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  4. Phases of clinical research - Wikipedia

    en.wikipedia.org/wiki/Phases_of_clinical_research

    If the estimated activity level exceeds 20%, the researcher will add more participants to get a better estimate of the response rate. A typical study for ruling out a 20% or lower response rate enters 14 participants. If no response is observed in the first 14 participants, the drug is considered not likely to have a 20% or higher activity level.

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  6. A/B testing - Wikipedia

    en.wikipedia.org/wiki/A/B_testing

    "A/B testing" is a shorthand for a simple randomized controlled experiment, in which a number of samples (e.g. A and B) of a single vector-variable are compared. [1] A/B tests are widely considered the simplest form of controlled experiment, especially when they only involve two variants.

  7. Weight loss - Wikipedia

    en.wikipedia.org/wiki/Weight_loss

    Intentional weight loss is the loss of total body mass as a result of efforts to improve fitness and health, or to change appearance through slimming. Weight loss is the main treatment for obesity, [1] [2] [3] and there is substantial evidence this can prevent progression from prediabetes to type 2 diabetes with a 7–10% weight loss and manage cardiometabolic health for diabetic people with a ...