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  2. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    Despite the fact that the likelihood ratio in favor of the alternative hypothesis over the null is close to 100, if the hypothesis was implausible, with a prior probability of a real effect being 0.1, even the observation of p = 0.001 would have a false positive rate of 8 percent. It wouldn't even reach the 5 percent level.

  3. Rate of return - Wikipedia

    en.wikipedia.org/wiki/Rate_of_return

    The difference between them is large only when percent changes are high. For example, an arithmetic return of +50% is equivalent to a logarithmic return of 40.55%, while an arithmetic return of −50% is equivalent to a logarithmic return of −69.31%.

  4. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    In statistics, a k-th percentile, also known as percentile score or centile, is a score below which a given percentage k of scores in its frequency distribution falls ("exclusive" definition) or a score at or below which a given percentage falls ("inclusive" definition); i.e. a score in the k-th percentile would be above approximately k% of all scores in its set.

  5. Estimates of historical world population - Wikipedia

    en.wikipedia.org/wiki/Estimates_of_historical...

    0.35–0.40: 0.43–0.50: 0.50–0.58 ... or "what percentage of people who have ever lived are alive today?" ... Some sources give these numbers rounded to the ...

  6. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    A foe is a unit of energy equal to 10 44 joules (≈9.478 × 10 40 BTU) that was invented by physicist Gerry Brown of Stony Brook University. To measure the staggeringly immense amount of energy produced by a supernova , specialists occasionally use the "foe", an acronym derived from the phrase [ten to the power of] f ifty- o ne e rgs, or 10 51 ...

  7. Names of large numbers - Wikipedia

    en.wikipedia.org/wiki/Names_of_large_numbers

    Traditional American usage (which was also adapted from French usage but at a later date), Canadian, and modern British usage assign new names for each power of one thousand (the short scale). Thus, a billion is 1000 × 1000 2 = 10 9 ; a trillion is 1000 × 1000 3 = 10 12 ; and so forth.

  8. List of common misconceptions - Wikipedia

    en.wikipedia.org/wiki/List_of_common_misconceptions

    Netflix was not founded after its co-founder Reed Hastings was charged a $40 late fee by Blockbuster. Hastings made the story up to summarize Netflix's value proposition; Netflix's founders were actually inspired by Amazon. PepsiCo in no real sense ever owned the "6th most powerful navy" in the world after a deal with the Soviet Union. In 1989 ...

  9. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    In 2019, 39 million km 2 (15 million sq mi) of Earth's land surface consisted of forest and woodlands, 12 million km 2 (4.6 million sq mi) was shrub and grassland, 40 million km 2 (15 million sq mi) were used for animal feed production and grazing, and 11 million km 2 (4.2 million sq mi) were cultivated as croplands. [271]