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  2. Sensitivity and specificity - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_and_specificity

    In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate). If 100 patients known to have a disease were tested, and 43 test positive, then the test has ...

  3. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    Fundamental operation A block diagram of a PID controller in a feedback loop. r(t) is the desired process variable (PV) or setpoint (SP), and y(t) is the measured PV.. The distinguishing feature of the PID controller is the ability to use the three control terms of proportional, integral and derivative influence on the controller output to apply accurate and optimal control.

  4. India - Wikipedia

    en.wikipedia.org/wiki/India

    India has been a member of World Trade Organization since 1 January 1995. The 522-million-worker Indian labour force is the world's second-largest, as of 2017. The service sector makes up 55.6% of GDP, the industrial sector 26.3% and the agricultural sector 18.1%.

  5. English language - Wikipedia

    en.wikipedia.org/wiki/English_language

    English is a West Germanic language in the Indo-European language family, whose speakers, called Anglophones, originated in early medieval England. [4] [5] [6] The namesake of the language is the Angles, one of the ancient Germanic peoples that migrated to the island of Great Britain.

  6. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The overall grade for the class is then typically weighted so that the final grade represents a stated proportion of different types of work. For example, daily homework may be counted as 50% of the final grade, chapter quizzes may count for 20%, the comprehensive final exam may count for 20%, [1] and a major project may count for the remaining ...

  7. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci sequence. A tiling with squares whose side lengths are successive Fibonacci numbers: 1, 1, 2, 3, 5, 8, 13 and 21. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn .

  8. Ayn Rand - Wikipedia

    en.wikipedia.org/wiki/Ayn_Rand

    Ayn Rand. Alice O'Connor (born Alisa Zinovyevna Rosenbaum; [c] February 2 [ O.S. January 20], 1905 – March 6, 1982), better known by her pen name Ayn Rand ( / aɪn / INE ), was a Russian-born American author and philosopher. [3] She is known for her fiction and for developing a philosophical system she named Objectivism.

  9. ESPN - Wikipedia

    en.wikipedia.org/wiki/ESPN

    ESPN (an abbreviation of its original name, the Entertainment and Sports Programming Network [2]) is an American international basic cable sports channel owned by The Walt Disney Company (80% and operational control) and Hearst Communications (20%) through the joint venture ESPN Inc. The company was founded in 1979 by Bill Rasmussen, Scott ...