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Chi-square statistic.
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The chi-square statistic is used to measure the agreement between categorical data and a multinomial model that predicts the relative frequency of outcomes in each possible category. suppose there are n independent trials, each of which can result in one
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Chi-square, английский
Chi-square curve, английский
The chi-square curve is a family of curves that depend on a parameter called degrees of freedom (d.f.). the chi-square curve is an approximation to the probability histogram of the chi-square statistic for multinomial model if the expected number of outcomes in each category is large. the chi-square curve is positive, and its total area is 100%, so we can think of it as the probability histogram of a random variable. the balance point of the curve is d.f., so the expected value of the corresponding random variable would equal d.f.. the standard error of the corresponding random variable would be (2×d.f.)½. as d.f. grows, the shape of the chi-square curve approaches the shape of the normal curve. this page shows the chi-square curve.
Chi-square curve., английский
The chi-square curve is a family of curves that depend on a parameter called degrees of freedom (d.f.). the chi-square curve is an approximation to the probability histogram of the chi-square statistic for multinomial model if the expected number of outco
Chi-square distribution, английский
- The chi-square distribution is defined by:
- Распределение хи-квадрат. см. distribution (распределение).
- Распределение хи-квадрат. это распределение может рассматриваться как распределение суммы квадратов v независимых нормиро-ванных случайных величин, распределенных по нормальному закону. параметр v означает число степеней свободы [23].
Chi-square statistic, английский
The chi-square statistic is used to measure the agreement between categorical data and a multinomial model that predicts the relative frequency of outcomes in each possible category. suppose there are n independent trials, each of which can result in one of k possible outcomes. suppose that in each trial, the probability that outcome i occurs is pi, for i = 1, 2, … , k, and that these probabilities are the same in every trial. the expected number of times outcome 1 occurs in the n trials is n×p1; more generally, the expected number of times outcome i occurs is
Chi-squared distribution, английский
Where expected frequencies are sufficiently high, hypothesised distributions of counts may be approximated by a normal distribution rather than an exact binomial distribution. the corresponding distribution of the chi-squared statistic can be derived alge
Chi-squared statistic, английский
[named by e.s. pearson ()?]. this is a long-established test statistic for measuring the extent to which a set of categorical outcomes depart from a hypothesised set of probabilities. it is calculated as a sum of terms over the available categories, where
Statistic., английский
A number that can be computed from data, involving no unknown parameters. as a function of a random sample, a statistic is a random variable. statistics are used to estimate parameters, and to test hypotheses.
Multinomial, английский
Многочлен; полином
Independent, английский
- One who logs and sells his output on the open market; not associated with a mill or under company or dealer contract (19).
- Независимый; автономный
- Независимый, автономный
- Независимый, самостоятельный; рантье (лицо, живущее на доходы от капитала)
- Независимый
- A независимый
- A merchant ship under naval control, but sailing alone and unescorted by any warship.
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Complement., английский
The complement of a subset of a given set is the collection of all elements of the set that are not elements of the subset.
Chi-square curve., английский
The chi-square curve is a family of curves that depend on a parameter called degrees of freedom (d.f.). the chi-square curve is an approximation to the probability histogram of the chi-square statistic for multinomial model if the expected number of outco
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