At 10:14 PM 3/13/02 +0100, [EMAIL PROTECTED] wrote: >indeed a house to house survey in the evening must have a bias, >underestimating the cinema goers,
how do we really know this? this assumes that all or most go to movies at night ... maybe if you did your house to house during the week ... and not the weekend ... there would be no particular bias but then again, even on the weekends, given the prices of movies and the reductions for matinees ... there might be a much greater number going during the day on the weekend ... and, if you don't catch them home on a weekend night, it may have nothing to do with them being at the movies of course there is nothing stated in the question that tells you WHAT evenings are used there are just too many unknown factors potentially at play with this item ... to know with any certainty ... which choice would be best 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/ . =================================================================
