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  2. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    0.00034 has 2 significant figures (3 and 4) if the resolution is 0.00001. Zeros to the right of the last non-zero digit (trailing zeros) in a number with the decimal point are significant if they are within the measurement or reporting resolution. 1.200 has four significant figures (1, 2, 0, and 0) if they are allowed by the measurement resolution.

  3. Tukey's range test - Wikipedia

    en.wikipedia.org/wiki/Tukey's_range_test

    However, the studentized range distribution used to determine the level of significance of the differences considered in Tukey's test has vastly broader application: It is useful for researchers who have searched their collected data for remarkable differences between groups, but then cannot validly determine how significant their discovered ...

  4. Khan Academy - Wikipedia

    en.wikipedia.org/wiki/Khan_Academy

    Khan Academy is an American non-profit [3] educational organization created in 2006 by Sal Khan. [1] Its goal is to create a set of online tools that help educate students. [ 4 ] The organization produces short video lessons. [ 5 ]

  5. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    All of the significant digits remain, but the placeholding zeroes are no longer required. Thus 1 230 400 would become 1.2304 × 10 6 if it had five significant digits. If the number were known to six or seven significant figures, it would be shown as 1.230 40 × 10 6 or 1.230 400 × 10 6. Thus, an additional advantage of scientific notation is ...

  6. Sal Khan - Wikipedia

    en.wikipedia.org/wiki/Sal_Khan

    Salman "Sal" Amin Khan (born October 11, 1976) is an American educator and the founder of Khan Academy, a free online non-profit educational platform with which he has produced over 6,500 video lessons teaching a wide spectrum of academic subjects, originally focusing on mathematics and science. [1]

  7. Significant Figures (book) - Wikipedia

    en.wikipedia.org/wiki/Significant_Figures_(book)

    Significant Figures: The Lives and Work of Great Mathematicians is a 2017 nonfiction book by British mathematician Ian Stewart FRS CMath FIMA, published by Basic Books. [1] In the work, Stewart discusses the lives and contributions of 25 figures who are prominent in the history of mathematics. [ 2 ]

  8. Smarthistory - Wikipedia

    en.wikipedia.org/wiki/Smarthistory

    Smarthistory is a free resource for the study of art history created by art historians Beth Harris and Steven Zucker. Smarthistory is an independent not-for-profit organization and the official partner of the Khan Academy for art history.

  9. Atlantic Revolutions - Wikipedia

    en.wikipedia.org/wiki/Atlantic_Revolutions

    A tree of liberty topped with a Phrygian cap set up in Mainz in 1793. Such symbols were used by several revolutionary movements of the time. It took place in both the Americas and Europe, including the United States (1775–1783), Polish–Lithuanian Commonwealth (1788–1792), France and French-controlled Europe (1789–1814), Haiti (1791–1804), Ireland (1798) and Spanish America (1810 ...