Dear all staters,
I have to define the standard errors of a sample which is the union of j
sub-samples.
I have the mean and related standard error for each sub sample j,
My question how do I get an estimate of the standard error for my merged
sample ?
NB: all my sub samples are independents and exclusive
Thanking you in advance,
Olivier Van Parys
Senior Research Manager @ Amárach Consulting
28 Upper Fitzwilliam Street
Dublin 2
Tel: 01 6619147 Fax: 01 6610312
E-mail: [log in to unmask]
Web: www.amarach.com
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