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<section begin=title /><noinclude>{{DISPLAYTITLE:База Знаний: {{OOoC|1}}. </noinclude>Функция FTEST<noinclude>}}</noinclude><section end=title />
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[[en:Documentation/How_Tos/Calc:_FTEST_function]]
 
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== FTEST ==
 
== FTEST ==
Возвращает результат F-теста.
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Возвращает результат F-теста (двусторонний уровень значимости).
  
 
=== Syntax: ===
 
=== Syntax: ===
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=== Example: ===
 
=== Example: ===
 
<tt>'''FTEST({9;8;6;8}; {5;6;7})'''</tt>
 
<tt>'''FTEST({9;8;6;8}; {5;6;7})'''</tt>
: returns approximately <tt>'''0.82'''</tt>. The probability that the variances of these two samples are not significantly different is about 82%. Note: a real world example would need more data than this.
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: возвращает приблизительное значение <tt>'''0.82'''</tt>. The probability that the variances of these two samples are not significantly different is about 82%. Note: a real world example would need more data than this.
  
 
=== Issues: ===
 
=== Issues: ===
 
* Earlier versions of Excel and the ODFF draft specification incorrectly claimed this was a one-tailed test.
 
* Earlier versions of Excel and the ODFF draft specification incorrectly claimed this was a one-tailed test.
  
{{Documentation/SeeAlso|
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{{SeeAlso|RU|
* [[Documentation/How_Tos/Calc: FDIST function|FDIST]]
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* {{SecTitle|RU/kb/00000130}}
 
* [[Documentation/How_Tos/Using Arrays|Array formulas]]
 
* [[Documentation/How_Tos/Using Arrays|Array formulas]]
 
* [[Documentation/How_Tos/Calc: Statistical functions|Statistical functions]]
 
* [[Documentation/How_Tos/Calc: Statistical functions|Statistical functions]]
 
* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]]
 
* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]]
 
* [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}}
 
* [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}}
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{{RUsignyear||Don_alessandro|2009}}
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{{RUkbCalcBottom}}

Latest revision as of 12:27, 16 July 2018


FTEST

Возвращает результат F-теста (двусторонний уровень значимости).

Syntax:

FTEST(data1; data2)

data1 and data2 are ranges or arrays (possibly of different size) containing numbers, on which the F-test is performed. The F-test calculates the likelihood that two samples have the same variance.
In effect, the sample variances of data1 and data2 are calculated. data1 and data2 are re-ordered if necessary so that data1 has the larger variance (σ1) and data2 the smaller (σ2), and an F_value is calculated as σ12. The result returned by FTEST is 2*FDIST(F_value; COUNT(data1)-1; COUNT(data2)-1). This is the two-tailed probability that the variances in data1 and data2 are not significantly different. (The internal algorithms used by Calc are more sophisticated than this).
Advanced topic:
The parameters data1 and data2 are always evaluated as array formulas.

Example:

FTEST({9;8;6;8}; {5;6;7})

возвращает приблизительное значение 0.82. The probability that the variances of these two samples are not significantly different is about 82%. Note: a real world example would need more data than this.

Issues:

  • Earlier versions of Excel and the ODFF draft specification incorrectly claimed this was a one-tailed test.



Смотрите также:






Don_alessandro
2009









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