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  2. List of countries by median age - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    The median age is the index that divides the entire population into two numerically equal age groups, one younger than that age and the other older than that age.

  3. Woman - Wikipedia

    en.wikipedia.org/wiki/Woman

    The normal hematocrit level for a woman is 36% to 48% (for men, 41% to 50%). The normal level of hemoglobin (an oxygen-transport protein found in red blood cells) for women is 12.0 to 15.5 g/dL (for men, 13.5 to 17.5 g/dL).

  4. Waterlow score - Wikipedia

    en.wikipedia.org/wiki/Waterlow_score

    The Waterlow score (or Waterlow scale) gives an estimated risk for the development of a pressure sore in a given patient. The tool was developed in 1985 by clinical nurse teacher Judy Waterlow . It is available both on a two-sided score card and on an app.

  5. Receiver operating characteristic - Wikipedia

    en.wikipedia.org/wiki/Receiver_operating...

    A classification model (classifier or diagnosis [7]) is a mapping of instances between certain classes/groups.Because the classifier or diagnosis result can be an arbitrary real value (continuous output), the classifier boundary between classes must be determined by a threshold value (for instance, to determine whether a person has hypertension based on a blood pressure measure).

  6. Education - Wikipedia

    en.wikipedia.org/wiki/Education

    Contemporary examples are the Test of English as a Foreign Language, which is a globally used test to assess language proficiency in non-native English speakers, and the Programme for International Student Assessment, which evaluates education systems across the world based on the performance of 15-year-old students in reading, mathematics, and ...

  7. Education in the United States - Wikipedia

    en.wikipedia.org/wiki/Education_in_the_United_States

    This is an accepted version of this page This is the latest accepted revision, reviewed on 6 January 2025. Education in the United States of America National education budget (2023-24) Budget $222.1 billion (0.8% of GDP) Per student More than $11,000 (2005) General details Primary languages English System type Federal, state, local, private Literacy (2017 est.) Total 99% Male 99% Female 99% ...

  8. Fever - Wikipedia

    en.wikipedia.org/wiki/Fever

    Fever or pyrexia in humans is a symptom of an anti-infection defense mechanism that appears with body temperature exceeding the normal range due to an increase in the body's temperature set point in the hypothalamus.

  9. COVID-19 testing - Wikipedia

    en.wikipedia.org/wiki/COVID-19_testing

    SARS-CoV-2 antigens can be detected before onset of COVID-19 symptoms (as soon as SARS-CoV-2 virus particles) with more rapid test results, but with less sensitivity than PCR tests for the virus. [57] COVID-19 rapid antigen tests are lateral flow immunoassays that detect the presence of a specific viral antigen, which indicates current viral ...