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  2. Monte Carlo method - Wikipedia

    en.wikipedia.org/wiki/Monte_Carlo_method

    the (pseudo-random) number generator has certain characteristics (e.g. a long "period" before the sequence repeats) the (pseudo-random) number generator produces values that pass tests for randomness; there are enough samples to ensure accurate results; the proper sampling technique is used; the algorithm used is valid for what is being modeled

  3. Personal numbering - Wikipedia

    en.wikipedia.org/wiki/Personal_numbering

    Personal numbering is the name for the virtual telephone number service in the UK.Typically the national destination code used for this service is (0)70.The service provides a flexible virtual telephone number able to be routed to any other number, including international mobiles.

  4. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    The moment generating function of a real random variable is the expected value of , as a function of the real parameter . For a normal distribution with density f {\textstyle f} , mean μ {\textstyle \mu } and variance σ 2 {\textstyle \sigma ^{2}} , the moment generating function exists and is equal to

  5. Binomial distribution - Wikipedia

    en.wikipedia.org/wiki/Binomial_distribution

    [43] [44] One way to generate random variates samples from a binomial distribution is to use an inversion algorithm. To do so, one must calculate the probability that Pr(X = k) for all values k from 0 through n. (These probabilities should sum to a value close to one, in order to encompass the entire sample space.)

  6. 44 (number) - Wikipedia

    en.wikipedia.org/wiki/44_(number)

    44 has an aliquot sum of 40, within an aliquot sequence of three composite numbers (44, 40, 50, 43, 1, 0) rooted in the prime 43-aliquot tree. Since the greatest prime factor of 44 2 + 1 = 1937 is 149 and thus more than 44 twice, 44 is a Størmer number. [3] Given Euler's totient function, φ(44) = 20 and φ(69) = 44.

  7. Variance - Wikipedia

    en.wikipedia.org/wiki/Variance

    To see how, consider that a theoretical probability distribution can be used as a generator of hypothetical observations. If an infinite number of observations are generated using a distribution, then the sample variance calculated from that infinite set will match the value calculated using the distribution's equation for variance.

  8. List of postcode areas in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_postcode_areas_in...

    For those within geographic postcode areas, the first two numbers can be any number though they are generally larger than the numbers allocated to geographic districts. Some fall within the range 91 to 99 (e.g. S98 for payments to MNBA Ltd; NE98 for Department for Work and Pensions , Central Office, Newcastle-upon-Tyne).

  9. Gamma distribution - Wikipedia

    en.wikipedia.org/wiki/Gamma_distribution

    In each of these forms, both parameters are positive real numbers. The distribution has important applications in various fields, including econometrics , Bayesian statistics , life testing. [ 3 ] In econometrics, the ( α , θ ) parameterization is common for modeling waiting times, such as the time until death, where it often takes the form ...