Agreed. I always provide a context, typcially a published research article from which I deduced the model for simulating the data. For example: http://core.ecu.edu/psyc/wuenschk/SimData/XD-T.htm .
Karl W. ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "Wuensch, Karl L" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, November 04, 2003 5:31 PM Subject: Re: [edstat] Data Screening (was Teaching Statistics) And it is a bad idea to use concocted out-of-context data. Without a context there is no way to decide what to do with "kinky" points. Kjetil Halvorsen On 4 Nov 2003 at 10:25, Wuensch, Karl L wrote: > > > I am guilty of spoiling my students by usually providing them with > clean data, generated such that distributional assumptions are all met, > there are no out-of-range data, and so on. Every once and a while, however, > I do something that I really should do more often -- I throw into the data > for their assignments a few kinks and expect them to find them. If they do > not screen the data, they don't find them. Of course, the more challenging > question is what to do with the kinky data -- excluding them from the > analysis is often a bad idea. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Karl L. Wuensch, Department of Psychology, > East Carolina University, Greenville NC 27858-4353 > Voice: 252-328-4102 Fax: 252-328-6283 > [EMAIL PROTECTED] > http://core.ecu.edu/psyc/wuenschk/klw.htm > . > . > ================================================================= > Instructions for joining and leaving this list, remarks about the > problem of INAPPROPRIATE MESSAGES, and archives are available at: > . http://jse.stat.ncsu.edu/ . > ================================================================= . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
