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  2. Angela Alsobrooks improperly claimed tax deductions on DC ...

    www.aol.com/angela-alsobrooks-improperly-claimed...

    Angela Alsobrooks, the Democratic nominee for US Senate in Maryland, improperly took advantage of tax breaks she did not qualify for, including one meant for low-income senior citizens, saving ...

  3. Total harmonic distortion - Wikipedia

    en.wikipedia.org/wiki/Total_harmonic_distortion

    To understand a system with an input and an output, such as an audio amplifier, we start with an ideal system where the transfer function is linear and time-invariant.When a sinusoidal signal of frequency ω passes through a non-ideal, non-linear device, additional content is added at multiples nω (harmonics) of the original frequency.

  4. Attention deficit hyperactivity disorder - Wikipedia

    en.wikipedia.org/wiki/Attention_deficit...

    Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.

  5. Coefficient of variation - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_variation

    The data set [1, 5, 6, 8, 10, 40, 65, 88] has still more variability. Its standard deviation is 32.9 and its average is 27.9, giving a coefficient of variation of 32.9 / 27.9 = 1.18 In these examples, we will take the values given as the entire population of values .

  6. Tax withholding - Wikipedia

    en.wikipedia.org/wiki/Tax_withholding

    Tax withholding has a historical origin dating back to 1862 in the United States, initiated by President Abraham Lincoln during the Civil War era to aid in financing the war efforts. Concurrently, excise taxes were also introduced by the federal government for the same purpose.

  7. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [18] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.

  8. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    Change in volume with increasing alc/vol. Mixing two solutions of alcohol of different strengths usually causes a change in volume. Mixing pure water with a solution less than 24% by mass causes a slight increase in total volume, whereas the mixing of two solutions above 24% causes a decrease in volume.

  9. k-means clustering - Wikipedia

    en.wikipedia.org/wiki/K-means_clustering

    k-means clustering is a method of vector quantization, originally from signal processing, that aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest mean (cluster centers or cluster centroid), serving as a prototype of the cluster.

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