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  2. Cost overrun - Wikipedia

    en.wikipedia.org/wiki/Cost_overrun

    The cost overruns constituted 33% of the total expense. The budget for the bridge increased to 150%. The cost overruns exceeded the original budget by 50%. The final example is the most commonly used as it specifically describes the cost overruns exclusively whereas the other two describe the overrun as an aspect of the total expense.

  3. Cost of poor quality - Wikipedia

    en.wikipedia.org/wiki/Cost_of_poor_quality

    Cost of poor quality (COPQ) or poor quality costs (PQC) or cost of nonquality, are costs that would disappear if systems, processes, and products were perfect. COPQ was popularized by IBM quality expert H. James Harrington in his 1987 book Poor-Quality Cost. [1] COPQ is a refinement of the concept of quality costs.

  4. History of United States postage rates - Wikipedia

    en.wikipedia.org/wiki/History_of_United_States...

    The large jumps in the early 1900s are because a change by a single penny was significant compared to the cost of the stamp. For example, the price increase from $0.02 to $0.03 on July 6, 1932, was a 50% increase in cost.

  5. Price gouging - Wikipedia

    en.wikipedia.org/wiki/Price_gouging

    The law includes exceptions for price increases that can be justified in terms of the increased cost of supply, transportation, demand, or storage. [13] Florida prohibits a price increase “that grossly exceeds the average price” of that same item in the 30 days leading up to the emergency declaration. [ 14 ]

  6. 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 in order to compute one value of a statistic (such as, for example, the sample mean or sample variance) for each sample, then the sampling ...

  7. Exponential growth - Wikipedia

    en.wikipedia.org/wiki/Exponential_growth

    For example the function () = grows at an ever increasing rate, but is very remote from growing exponentially. For example, when =, it grows at 3 times its size, but when = it grows at 30% of its size. If an exponentially growing function grows at a rate that is 3 times is present size, then it always grows at a rate that is 3 times its present ...

  8. Type I and type II errors - Wikipedia

    en.wikipedia.org/wiki/Type_I_and_type_II_errors

    To reduce the probability of committing a type I error, making the alpha value more stringent is both simple and efficient. To decrease the probability of committing a type II error, which is closely associated with analyses' power, either increasing the test's sample size or relaxing the alpha level could increase the analyses' power.

  9. Rate (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Rate_(mathematics)

    For example, acceleration is a change in velocity with respect to time Temporal rate is a common type of rate ("per unit of time"), such as speed, heart rate, and flux. [2] In fact, often rate is a synonym of rhythm or frequency, a count per second (i.e., hertz); e.g., radio frequencies or sample rates.

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