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  2. AP United States Government and Politics - Wikipedia

    en.wikipedia.org/wiki/AP_United_States...

    Advanced Placement (AP) United States Government and Politics (often shortened to AP Gov or AP GoPo and sometimes referred to as AP American Government or simply AP Government) is a college-level course and examination offered to high school students through the College Board's Advanced Placement Program.

  3. AP Comparative Government and Politics - Wikipedia

    en.wikipedia.org/wiki/AP_Comparative_Government...

    55 multiple choice questions in 60 minutes 50% of score Each question will have 4 options. There will be 2 text-based sources, each one accompanied by 2–2 questions. There will be 3 quantitative sources, each one accompanied by 2–2 questions. 4 free response questions in 90 minutes 50% of score 1 conceptual analysis question

  4. Central limit theorem for directional statistics - Wikipedia

    en.wikipedia.org/wiki/Central_limit_theorem_for...

    Directional statistics is the subdiscipline of statistics that deals with directions (unit vectors in R n), axes (lines through the origin in R n) or rotations in R n. The means and variances of directional quantities are all finite, so that the central limit theorem may be applied to the particular case of directional statistics.

  5. Multiple comparisons problem - Wikipedia

    en.wikipedia.org/wiki/Multiple_comparisons_problem

    For example, if one test is performed at the 5% level and the corresponding null hypothesis is true, there is only a 5% risk of incorrectly rejecting the null hypothesis. However, if 100 tests are each conducted at the 5% level and all corresponding null hypotheses are true, the expected number of incorrect rejections (also known as false ...

  6. Alternative hypothesis - Wikipedia

    en.wikipedia.org/wiki/Alternative_hypothesis

    In statistical hypothesis testing, the alternative hypothesis is one of the proposed propositions in the hypothesis test. In general the goal of hypothesis test is to demonstrate that in the given condition, there is sufficient evidence supporting the credibility of alternative hypothesis instead of the exclusive proposition in the test (null hypothesis). [1]

  7. One- and two-tailed tests - Wikipedia

    en.wikipedia.org/wiki/One-_and_two-tailed_tests

    A two-tailed test applied to the normal distribution. A one-tailed test, showing the p-value as the size of one tail. In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter inferred from a data set, in terms of a test statistic. A two-tailed test ...

  8. AP Human Geography - Wikipedia

    en.wikipedia.org/wiki/AP_Human_Geography

    The first section consists of 60 multiple choice questions and the second section consists of 3 free-response questions. The sections are 60 and 75 minutes long, respectively. It is not necessary to answer the free-response questions in essay form; instead, points are awarded on certain keywords, examples, and other vital aspects.

  9. Directional selection - Wikipedia

    en.wikipedia.org/wiki/Directional_selection

    A significant example of directional selection in populations is the fluctuations of light and dark phenotypes in peppered moths in the 1800s. [16] During the industrial revolution, environmental conditions were rapidly changing with the newfound emission of dark, black smoke from factories that would change the color of trees, rocks, and other ...

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