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  2. List of countries by number of births - Wikipedia

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

    Country Number of births (2023) India 23,219,489 China 8,899,881 Nigeria 7,509,758 Pakistan 6,882,058 Indonesia 4,482,359 Democratic Republic of the Congo 4,369,683

  3. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr or 3 σ, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean ...

  4. Birth rate - Wikipedia

    en.wikipedia.org/wiki/Birth_rate

    15.5 1990–1995: 24.2: 2040–2045: 15.0 ... with just 1.1 children per woman being born. [50] ... In 2008–2009 the birth rate declined 5.9 percent for Hispanic ...

  5. Insensitivity to sample size - Wikipedia

    en.wikipedia.org/wiki/Insensitivity_to_sample_size

    Insensitivity to sample size is a cognitive bias that occurs when people judge the probability of obtaining a sample statistic without respect to the sample size.For example, in one study, subjects assigned the same probability to the likelihood of obtaining a mean height of above six feet [183 cm] in samples of 10, 100, and 1,000 men.

  6. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    With M = 365 days in a year, the average number of people required to find a pair with the same birthday is n = 1 + Q(M) ≈ 24.61659, somewhat more than 23, the number required for a 50% chance. In the best case, two people will suffice; at worst, the maximum possible number of M + 1 = 366 people is needed; but on average, only 25 people are ...

  7. List of multiple births - Wikipedia

    en.wikipedia.org/wiki/List_of_multiple_births

    Born prematurely at 28 weeks, six of the octuplets died within 12 hours of birth, and the remaining two died within three days. [113] [133] A set of octuplets was born between 30 September – 2 October 1996, in a hospital in South London, United Kingdom, to Mandy Allwood of Solihull. Allwood was only 19 weeks pregnant when she went into pre ...

  8. 97.5th percentile point - Wikipedia

    en.wikipedia.org/wiki/97.5th_percentile_point

    "The value for which P = .05, or 1 in 20, is 1.96 or nearly 2; it is convenient to take this point as a limit in judging whether a deviation is to be considered significant or not." [11] In Table 1 of the same work, he gave the more precise value 1.959964. [12] In 1970, the value truncated to 20 decimal places was calculated to be

  9. Sub-replacement fertility - Wikipedia

    en.wikipedia.org/wiki/Sub-replacement_fertility

    In the United States in 2022, women between the ages of 15 and 50 with a graduate or professional degree had the highest birthrate (62 births per 1,000 women), whereas women between the ages of 15 and 50 with less than a high school graduate had the lowest birthrate (32 births per 1,000 women) among all levels of educational attainment of the ...