On Jul 11, 2011, at 10:51 AM, Abraham Mathew wrote:
This is a very basic question, so please bear with me.
(8.1, 11.8) # headline 1 (9.2, 12.7) # headline 2 # these confidence intervals for the two headlines overlap. # therefore, the variation (headline 2) isn't more effective # than the control headline
Not sound reasoning and very imprecise wording. You should study basic statistics more with particular attention to the conditions under which a two-sample t-test will return a "significant" result. R-help is not a statistics tutoring facility, so you should pursue this elsewhere. There was a Math Q&A site out of Drexel University at one time. <obvious google search> Yes, there it is:
http://mathforum.org/ -- David Winsemius, MD West Hartford, CT ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
