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  2. Grouped data - Wikipedia

    en.wikipedia.org/wiki/Grouped_data

    Table 2: Frequency distribution of the time taken (in seconds) by the group of students to answer a simple math question; Time taken (in seconds) Frequency 5 ≤ t < 10: 1 10 ≤ t < 15: 4 15 ≤ t < 20: 6 20 ≤ t < 25: 4 25 ≤ t < 30: 2 30 ≤ t < 35: 3

  3. Frequency (statistics) - Wikipedia

    en.wikipedia.org/wiki/Frequency_(statistics)

    Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and in this way, the table summarizes the distribution of values in the sample. This is an example of a univariate (=single variable) frequency table. The frequency of each response to a survey question is depicted.

  4. List of probability distributions - Wikipedia

    en.wikipedia.org/wiki/List_of_probability...

    Benford's law, which describes the frequency of the first digit of many naturally occurring data. The ideal and robust soliton distributions. Zipf's law or the Zipf distribution. A discrete power-law distribution, the most famous example of which is the description of the frequency of words in the English language.

  5. Contingency table - Wikipedia

    en.wikipedia.org/wiki/Contingency_table

    The example above is the simplest kind of contingency table, a table in which each variable has only two levels; this is called a 2 × 2 contingency table. In principle, any number of rows and columns may be used. There may also be more than two variables, but higher order contingency tables are difficult to represent visually.

  6. Category:Mathematical tables - Wikipedia

    en.wikipedia.org/wiki/Category:Mathematical_tables

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  7. Chebyshev filter - Wikipedia

    en.wikipedia.org/wiki/Chebyshev_filter

    Gain and group delay of a fifth-order type II Chebyshev filter with ε = 0.1. The gain and the group delay for a fifth-order type II Chebyshev filter with ε=0.1 are plotted in the graph on the left. It can be seen that there are ripples in the gain in the stopband but not in the pass band.

  8. Infrared spectroscopy correlation table - Wikipedia

    en.wikipedia.org/wiki/Infrared_spectroscopy...

    An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups.

  9. Filter (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Filter_(mathematics)

    In mathematics, a filter or order filter is a special subset of a partially ordered set (poset), describing "large" or "eventual" elements. Filters appear in order and lattice theory, but also topology, whence they originate. The notion dual to a filter is an order ideal.