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  2. Instrumental variables estimation - Wikipedia

    en.wikipedia.org/wiki/Instrumental_variables...

    In statistics, econometrics, epidemiology and related disciplines, the method of instrumental variables (IV) is used to estimate causal relationships when controlled experiments are not feasible or when a treatment is not successfully delivered to every unit in a randomized experiment. [1]

  3. Parity-check matrix - Wikipedia

    en.wikipedia.org/wiki/Parity-check_matrix

    Formally, a parity check matrix H of a linear code C is a generator matrix of the dual code, C ⊥. This means that a codeword c is in C if and only if the matrix-vector product Hc ⊤ = 0 (some authors [1] would write this in an equivalent form, cH ⊤ = 0.) The rows of a parity check matrix are the coefficients of the parity check equations. [2]

  4. Toxicity category rating - Wikipedia

    en.wikipedia.org/wiki/Toxicity_category_rating

    IV Oral LD 50: Up to and including 50 mg/kg From 50 to 500 mg/kg From 500 to 5000 mg/kg Greater than 5000 mg/kg Inhalation LC50 Up to and including 0.2 mg/L From 0.2 to 2 mg/L From 2. to 20 mg/L Greater than 20 mg/L Dermal LD50 Up to and including 200 mg/kg From 200 to 2000 mg/kg From 2000 to 20,000 mg/kg Greater than 20,000 mg/kg

  5. Emergency medical responder levels by U.S. state - Wikipedia

    en.wikipedia.org/wiki/Emergency_medical...

    EMT with intravenous authorization (EMT- IV is not a separate certification level but an authorization by an agency physician medical director after verification of approved education and skills competency) [9] Advanced EMT (AEMT) EMT-Intermediate (EMT-I) Paramedic [10] [11] Paramedic with Critical Care endorsement (P-CC)

  6. IQ classification - Wikipedia

    en.wikipedia.org/wiki/IQ_classification

    The fourth revision of the Stanford–Binet scales (S-B IV) was developed by Thorndike, Hagen, and Sattler and published by Riverside Publishing in 1986. It retained the deviation scoring of the third revision with each standard deviation from the mean being defined as a 16 IQ point difference. The S-B IV adopted new classification terminology.

  7. List of body armor performance standards - Wikipedia

    en.wikipedia.org/wiki/List_of_body_armor...

    The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.

  8. High school students rescue man who fell on train tracks

    www.aol.com/high-school-students-rescue-man...

    CBS News contributor David Begnaud shows how three teens at a high school in Iowa jumped into action to help save a man they saw struggling after he fell on train tracks.

  9. Biopharmaceutics Classification System - Wikipedia

    en.wikipedia.org/wiki/Biopharmaceutics...

    The Biopharmaceutics Classification System (BCS) is a system to differentiate drugs on the basis of their solubility and permeability. [1]This system restricts the prediction using the parameters solubility and intestinal permeability.