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  2. Balls into bins problem - Wikipedia

    en.wikipedia.org/wiki/Balls_into_bins_problem

    The problem involves m balls and n boxes (or "bins"). Each time, a single ball is placed into one of the bins. Each time, a single ball is placed into one of the bins. After all balls are in the bins, we look at the number of balls in each bin; we call this number the load on the bin.

  3. Box counting - Wikipedia

    en.wikipedia.org/wiki/Box_counting

    Figure 1. A 32-segment quadric fractal viewed through "boxes" of different sizes. The pattern illustrates self similarity.. Box counting is a method of gathering data for analyzing complex patterns by breaking a dataset, object, image, etc. into smaller and smaller pieces, typically "box"-shaped, and analyzing the pieces at each smaller scale.

  4. Sample space - Wikipedia

    en.wikipedia.org/wiki/Sample_space

    For many experiments, there may be more than one plausible sample space available, depending on what result is of interest to the experimenter. For example, when drawing a card from a standard deck of fifty-two playing cards , one possibility for the sample space could be the various ranks (Ace through King), while another could be the suits ...

  5. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/Coupon_collector's_problem

    Let T m be the first time m copies of each coupon are collected. They showed that the expectation in this case satisfies: They showed that the expectation in this case satisfies: E ⁡ ( T m ) = n log ⁡ n + ( m − 1 ) n log ⁡ log ⁡ n + O ( n ) , as n → ∞ . {\displaystyle \operatorname {E} (T_{m})=n\log n+(m-1)n\log \log n+O(n),{\text ...

  6. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    The table shown on the right can be used in a two-sample t-test to estimate the sample sizes of an experimental group and a control group that are of equal size, that is, the total number of individuals in the trial is twice that of the number given, and the desired significance level is 0.05. [4]

  7. Packing problems - Wikipedia

    en.wikipedia.org/wiki/Packing_problems

    An a × b rectangle can be packed with 1 × n strips if and only if n divides a or n divides b. [15] [16] de Bruijn's theorem: A box can be packed with a harmonic brick a × a b × a b c if the box has dimensions a p × a b q × a b c r for some natural numbers p, q, r (i.e., the box is a multiple of the brick.) [15]

  8. Size–weight illusion - Wikipedia

    en.wikipedia.org/wiki/Size–weight_illusion

    The illusion occurs when a person underestimates the weight of a larger object (e.g. a box) when compared to a smaller object of the same mass.The illusion also occurs when the objects are not lifted against gravity, but accelerated horizontally, so it should be called a size-mass illusion. [6]

  9. Urn problem - Wikipedia

    en.wikipedia.org/wiki/Urn_problem

    In Ars Conjectandi (1713), Jacob Bernoulli considered the problem of determining, given a number of pebbles drawn from an urn, the proportions of different colored pebbles within the urn. This problem was known as the inverse probability problem, and was a topic of research in the eighteenth century, attracting the attention of Abraham de ...