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help for ^ci2^, ^cii2^               (STB 59 - sg159 PT Seed - paul.seed@@kcl.ac.uk)
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Confidence intervals for correlations
-------------------------------------


	^ci2^ varname1 varname2 [^if^ exp] [^in^ range] [weight] [^, COrr SPearman^]

	^cii2^ #n #corr [^, corr^]


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

Without the ^corr^ or ^spear^ options, ^ci2^ and ^cii2^ behave as @ci@ and @cii@.

With option ^corr^, ^ci2^ calculates the Pearson product moment correlation
& produces a confidence interval, based on Fisher's transformation.  As with 
@correlate@, ^ci2^ takes frequency and analytic weights.

With option ^spearman^, (with or without ^corr^), Spearman's rank correlation is used.

^cii2^ is the immediate version.  There is no separate Spearman option, because 
the method for finding the correlation is the same in both cases.




Examples
--------
Use for correlations 
 . ^ci2 colorime icp , corr^

 . ^ci2 colorime icp , corr spearman^
 . ^ci2 colorime icp , spearman^
(Note: these last two are effectively the same.)

 . ^cii2 78 .52 , corr^			(78 paired observations, correlation 0.52)

Use as ^ci^ and ^cii^
 . ^ci2 mpg^
 . ^ci2 mpg price, level(90)^
 . ^ci2 promoted, binomial^
 . ^ci2 count, poisson^
 . ^ci2 deaths, exposure(pyears)^

 . ^cii2 166 19509 4379^                 (166 obs, mean=19509, sd=4379)
 . ^cii2 166 19509 4379, level(90)^
 . ^cii2 10 1^                           (10 binomial events, 1 observed success)
 . ^cii2 1 27, poisson^                  (27 Poisson events observed)



Also see
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 Manual: [R] correlate
On-line: @correlate@, @pwcorr@ 

