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===Purpose=== | ===Purpose=== | ||
Inverse F test and F test. | Inverse F test and F test. | ||
===Synopsis=== | ===Synopsis=== | ||
:fstat = ftest(p,n,d,''flag'') | :fstat = ftest(p,n,d,''flag'') | ||
===Description=== | ===Description=== | ||
fstat = ftest(p,n,d) or fstat = ftest(p,n,d,1) calculates the F statistic fstat given the probability point p and the number of degrees of freedom in the numerator n and | |||
fstat = ftest(p,n,d,2) calculates the probability point fstat given the F statistic p and the number of degrees of freedom in the numerator n and | <tt>fstat</tt> = ftest(<tt>p,n,d</tt>) or <tt>fstat</tt> = ftest(<tt>p,n,d,1</tt>) calculates the F statistic <tt>fstat</tt> given the probability point <tt>p</tt> and the number of degrees of freedom in the numerator <tt>n</tt> and denominator <tt>d</tt>. | ||
<tt>fstat</tt> = ftest(<tt>p,n,d</tt>,2) calculates the probability point <tt>fstat</tt> given the F statistic <tt>p</tt> and the number of degrees of freedom in the numerator <tt>n</tt> and denominator <tt>d</tt>. | |||
====Inputs==== | |||
* '''p''' = probability point or F statistic, depending upon <tt>flag</tt>. | |||
* '''n''' = number of degrees of freedom in the numerator. | |||
* '''d''' = number of degrees of freedom in the denominator. | |||
====Optional Inputs==== | |||
* '''flag''' = [ {1} | 2 ]; determines mode of function (1 => F test, 2=> inverse F test). | |||
====Output==== | |||
* '''fstat''' = F statistic or probability point, depending upon <tt>flag</tt>. | |||
===Examples=== | ===Examples=== | ||
a = ftest(0.05,5,8) | |||
a = ftest(3.6875,5,8,2) | <pre>a = ftest(0.05,5,8) | ||
a = | |||
3.6875 | |||
a = ftest(3.6875,5,8,2) | |||
a = | |||
0.050 </pre> | |||
===See Also=== | ===See Also=== | ||
[[chilimit]], [[statdemo]], [[ttestp]] | |||
[[chilimit]], [[statdemo]], [[ttestp]], [[anova1w]], [[anova2w]] | |||
Latest revision as of 14:01, 9 October 2008
Purpose
Inverse F test and F test.
Synopsis
- fstat = ftest(p,n,d,flag)
Description
fstat = ftest(p,n,d) or fstat = ftest(p,n,d,1) calculates the F statistic fstat given the probability point p and the number of degrees of freedom in the numerator n and denominator d.
fstat = ftest(p,n,d,2) calculates the probability point fstat given the F statistic p and the number of degrees of freedom in the numerator n and denominator d.
Inputs
- p = probability point or F statistic, depending upon flag.
- n = number of degrees of freedom in the numerator.
- d = number of degrees of freedom in the denominator.
Optional Inputs
- flag = [ {1} | 2 ]; determines mode of function (1 => F test, 2=> inverse F test).
Output
- fstat = F statistic or probability point, depending upon flag.
Examples
a = ftest(0.05,5,8) a = 3.6875 a = ftest(3.6875,5,8,2) a = 0.050