ChiSquared 指令

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ChiSquared[ <Degrees of Freedom>, x ]

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ChiSquared[ <Degrees of Freedom>, x, <Boolean Cumulative> ]

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ChiSquared[ <Degrees of Freedom>, <Variable Value> ]

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CAS 视窗

ChiSquared[ <Degrees of Freedom>, x ]

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ChiSquared[ <Degrees of Freedom d>, x ]

Creates probability density function (pdf) of Chi squared distribution with d degrees of freedom.

ChiSquared[ <Degrees of Freedom>, x, <Boolean Cumulative> ]

If Cumulative is true, creates cumulative distribution function of Chi squared distribution, otherwise creates pdf of Chi squared distribution.

ChiSquared[ <Degrees of Freedom d>, <Variable Value v> ]

Calculates the value of cumulative distribution function of Chi squared distribution at v, i.e. the probability P(X≤v) where X is a random variable with Chi squared distribution with d degrees of freedom.

备注： Returns the probability for a given x-coordinate's value (or area under the Chi squared distribution curve to the left of the given x-coordinate).

CAS Syntax

In CAS View only following syntax is supported:

ChiSquared[ <Degrees of Freedom d>, <Variable Value v> ]

Calculates the value of cumulative distribution function (cdf) of Chi squared distribution at v, i.e. the probability P(X≤v) where X is a random variable with Chi squared distribution with d degrees of freedom.

范例：

ChiSquared[4, 3] yields \gamma(2, \frac{3}{2}), which is approximately 0.44.