i thought of a related data situation ...but at the opposite end what if you were interested in the relationship between the time it takes students to take a test AND their test score
so, you have maybe 35 students in your 1 hour class that starts at 9AM ... you decide to note (by your watch) the time they turn in the test ... and about 9:20 the first person turns it in ... then 9:35 the second .... 9:45 the 3rd .... 9:47 the 4th ... and then, as you get to 10, when the time limit is up ... the rest sort of come up to the desk at the same time for about 1/2 of the students, you can pretty accurately write down the time ... but, as it gets closer to the time limit, you have more of a (literal) rush .... and, at the end ... you probably put down the same time on the last 8 students you could decide just to put the order of the answer sheet as it sits in the pile ... or, you might collapse the set to 3 groupings ... quick turner iners, middle time turner iners ... and slow turner iners BUT, this clouds the data here we have a situation where the BIG times have lots of the n ... where there are widely scattered (but infrequent) short times ... if you have time on the baseline, it is radically NEG skewed better ways to record the times do not really solve this even if you have a time stamper like i used to have to used when punching my time card on coming into and leaving work it's a conundrum for sure At 10:17 AM 2/28/02 +1100, Glen Barnett wrote: >Brad Anderson wrote: > > > > I have a continuous response variable that ranges from 0 to 750. I > > only have 90 observations and 26 are at the lower limit of 0, which is > > the modal category. > >If it's continuous, it can't really have categories (apart from those >induced by recording the variable to some limited precision, but people >don't generally call those categories). > >The fact that you have a whole pile of zeros makes it mixed rather than >continuous, and the fact that you say "category" makes it sound purely >discrete. > >Glen > > >================================================================= >Instructions for joining and leaving this list, remarks about the >problem of INAPPROPRIATE MESSAGES, and archives are available at > http://jse.stat.ncsu.edu/ >================================================================= Dennis Roberts, 208 Cedar Bldg., University Park PA 16802 <Emailto: [EMAIL PROTECTED]> WWW: http://roberts.ed.psu.edu/users/droberts/drober~1.htm AC 8148632401 ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =================================================================
