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help for ^aov1cont^                                     (statalist Mar. 20, 1998)
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Contrasts in one-way ANOVA from means, SD's and N's
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    ^aov1cont^ nvar meanvar sdvar [^if^ exp] [^in^ range]^,^
	^c^oeffs^(^coeffvar^)^|^tr^end [ ^le^vel^(^#^)^ ]


Description
-----------

^aov1cont^ calculates the contrast (L) for coefficients in coeffvar over the
means in meanvar.  The group sizes are in nvar and the SDs are in sdvar.


Options
-------

^coeffs(^coeffvar^)^|^trend^: one of these is REQUIRED. If ^trend^ is specified,
L is a standardized linear trend contrast using integers with spacing 1.

^level(^#^)^ defines the confidence interval coverage for L. Default: $S_level.


Remarks
-------

Like @contrast@, ^aov1cont^ calculates the standardized contrast L as

	L = (a1 * mean1) + (a2 * mean2) + (a3 * mean3) + ...

where mean1 is the first value of meanvar and a1 is the first STANDARDIZED
coefficient in coeffvar, and so on.  ^aov1cont^ always standardizes the coeff-
icients so that they add up to zero; it does so by subtracting the mean of
coeffvar from each of its values.  The standardized coefficients (a1, a2, etc)
are labelled ^__a^ in the output from ^aov1cont^.  The output includes a
confidence interval for L and a significance test for L = 0.


Examples
--------

 . ^aov1cont n mean sd, coeffs(c)^
 . ^aov1cont n mean sd, trend^


Stored
------

	^$S_1^	total number of observations in analysis of variance
	^$S_2^	number of groups in analysis of variance
	^$S_3^	value of standardized contrast, L
	^$S_4^	standard error of L
	^$S_5^	lower confidence limit for L
	^$S_6^	upper confidence limit for L
	^$S_7^	t value for test of L = 0
	^$S_8^	P value for test of L = 0


Also see
--------

 Manual:  [R] oneway
On-line:  help for @oneway@, @contrast@.
