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2. Ogive (statistics) - Wikipedia

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

   In statistics, an ogive, also known as a cumulative frequency polygon, can refer to one of two things: any hand-drawn graphic of a cumulative distribution function [ 1 ] any empirical cumulative distribution function.

3. Frequency (statistics) - Wikipedia

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

   In statistics, the frequency or absolute frequency of an event is the number of times the observation has occurred/been recorded in an experiment or study. [ 1 ] : 12–19 These frequencies are often depicted graphically or tabular form.

4. Radar chart - Wikipedia

   en.wikipedia.org/wiki/Radar_chart

   The radar chart is also known as web chart, spider chart, spider graph, spider web chart, star chart, [2] star plot, cobweb chart, irregular polygon, polar chart, or Kiviat diagram. [ 3 ] [ 4 ] It is equivalent to a parallel coordinates plot, with the axes arranged radially.

5. Cumulative frequency analysis - Wikipedia

   en.wikipedia.org/wiki/Cumulative_frequency_analysis

   Frequency analysis [2] is the analysis of how often, or how frequently, an observed phenomenon occurs in a certain range. Frequency analysis applies to a record of length N of observed data X 1, X 2, X 3. . . X N on a variable phenomenon X. The record may be time-dependent (e.g. rainfall measured in one spot) or space-dependent (e.g. crop ...

6. Pulse-repetition frequency - Wikipedia

   en.wikipedia.org/wiki/Pulse-repetition_frequency

   The pulse-repetition frequency (PRF) is the number of pulses of a repeating signal in a specific time unit. The term is used within a number of technical disciplines, notably radar . In radar, a radio signal of a particular carrier frequency is turned on and off; the term "frequency" refers to the carrier, while the PRF refers to the number of ...

7. Histogram - Wikipedia

   en.wikipedia.org/wiki/Histogram

   The total area of a histogram used for probability density is always normalized to 1. If the length of the intervals on the x-axis are all 1, then a histogram is identical to a relative frequency plot. Histograms are sometimes confused with bar charts. In a histogram, each bin is for a different range of values, so altogether the histogram ...

8. Grouped data - Wikipedia

   en.wikipedia.org/wiki/Grouped_data

   Another method of grouping the data is to use some qualitative characteristics instead of numerical intervals. For example, suppose in the above example, there are three types of students: 1) Below normal, if the response time is 5 to 14 seconds, 2) normal if it is between 15 and 24 seconds, and 3) above normal if it is 25 seconds or more, then the grouped data looks like:

9. Frequency domain - Wikipedia

   en.wikipedia.org/wiki/Frequency_domain

   One of the main reasons for using a frequency-domain representation of a problem is to simplify the mathematical analysis. For mathematical systems governed by linear differential equations, a very important class of systems with many real-world applications, converting the description of the system from the time domain to a frequency domain converts the differential equations to algebraic ...