This is a general statistic question, but maybe ... Suppose there are 1000 persons. In 2002, 400 out of those 1000 persons participated in a questionaire and 330 said they own a homepage. In 2008, 530 out of those 1000 persons participated in a questionaire and 490 said they own a homepage. What kind of information can I draw from this data? Given the sample size of 400 resp. 530 out of 1000, can I give an answer to 'significance'? Kind regards, Johann -- View this message in context: http://www.nabble.com/What-questions-can-be-asked-given-this-information--tp19275609p19275609.html Sent from the R help mailing list archive at Nabble.com.