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  2. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    Prostate specific antigen (PSA) 40–49 years: 1.2–2.9 [75] μg/L [5] [15] or ng/mL [23] More detailed cutoffs in PSA – Serum levels: 70–79 years, non-African-American: 4.0–9.0 [75] 70–79 years, African-American: 7.7–13 [75] PAP: 3 [23] units/dL (Bodansky units) Calcitonin: 5, [76] 15 [76] ng/L or pg/mL: Cutoff against medullary ...

  3. Just-noticeable difference - Wikipedia

    en.wikipedia.org/wiki/Just-noticeable_difference

    They make an impression of growing initially fast and then slower and slower (the difference between 10 and 20 seems larger than between 60 and 70). 2: Circles in the lower row grow in geometric progression: each one is larger by 40% than previous one. They make an impression of growing by the same amount at each step.

  4. p-value - Wikipedia

    en.wikipedia.org/wiki/P-value

    In a significance test, the null hypothesis is rejected if the p-value is less than or equal to a predefined threshold value , which is referred to as the alpha level or significance level. α {\displaystyle \alpha } is not derived from the data, but rather is set by the researcher before examining the data.

  5. Blood alcohol content - Wikipedia

    en.wikipedia.org/wiki/Blood_alcohol_content

    Blood is denser than water and 1 mL of blood has a mass of approximately 1.055 grams, thus a mass-volume BAC of 1 g/L corresponds to a mass-mass BAC of 0.948 mg/g. Sweden, Denmark, Norway, Finland, Germany, and Switzerland use mass-mass concentrations in their laws, [ 5 ] but this distinction is often skipped over in public materials, [ 13 ...

  6. List of countries by carbon dioxide emissions - Wikipedia

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

    Their main argument is illustrated by CO 2 per capita emissions in 2023, China's levels (9.24) are almost two thirds those of the United States (13.83) and less than a sixth of those of Palau (62.59 – the country with the highest emissions of CO 2 per capita).

  7. Standard normal table - Wikipedia

    en.wikipedia.org/wiki/Standard_normal_table

    gives a probability that a statistic is greater than Z. This equates to the area of the distribution above Z. Example: Find Prob(Z ≥ 0.69). Since this is the portion of the area above Z, the proportion that is greater than Z is found by subtracting Z from 1. That is Prob(Z ≥ 0.69) = 1 − Prob(Z ≤ 0.69) or {{{1}}}.

  8. Binomial distribution - Wikipedia

    en.wikipedia.org/wiki/Binomial_distribution

    However, for N much larger than n, the binomial distribution remains a good approximation, and is widely used. ... i.e. the greatest integer less than or equal to k.

  9. Oxygen saturation (medicine) - Wikipedia

    en.wikipedia.org/wiki/Oxygen_saturation_(medicine)

    The body maintains a stable level of oxygen saturation for the most part by chemical processes of aerobic metabolism associated with breathing.Using the respiratory system, red blood cells, specifically the hemoglobin, gather oxygen in the lungs and distribute it to the rest of the body.

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