# User Index Page for " probability distribution"

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## Discrete probability distribution

... In probability theory and statistics, a discrete probability distribution is a probability distribution characterized by a probability mass function. Thus, the distribution of a random variable X is discrete, and X is then called a discrete random variable, if ... [full article] (70 views)
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## Continuous probability distribution

... In probability theory, a probability distribution is called continuous if its cumulative distribution function is continuous[citation needed]. This is equivalent to saying that for random variables X with the distribution in question, Pr[X = a] = 0 for all real numbers a, i.e.: the probability that X attains the value a is zero, for any number a. If the distribution of X is continuous then X is called a continuous random variable. ... [full article] (67 views)
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## Histogram

... In statistics, a histogram is a technique to estimate the probability distribution of a variable, by counting the frequencies of data into discrete bins, and then plotting the number of members in each bin versus the bin number. This is usually but not necessarily displayed by a bar chart where each bar is erected over an interval, with an area equal to the frequency of the observations in the interval. The height of a rectangle is also equal to the frequency density of the interval, i.e., the ... [full article] (106 views)
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