In article <[EMAIL PROTECTED]>, Linda <[EMAIL PROTECTED]> wrote: >[EMAIL PROTECTED] (Henry) wrote in message >news:<[EMAIL PROTECTED]>... >> On 21 Jul 2002 15:30:34 -0700, [EMAIL PROTECTED] (Linda) wrote: >> >Do you mean that I need to check the correlation between the birth & >> >death rates? I have looked at the general pattern of the birth and >> >death rates and it seems that they are proportional to each other. >> >What do you mean by means of random variables??
>> No; I was asking whether knowing the birth and/or death rates at time >> t=t1 gave any information about the rates at time t=t2. >> The mean of a random variable is its expected value / first moment / >> average. >No...the birth & death rates are totally random over time. Births and deaths are random. However, this does not make the rates random. -- This address is for information only. I do not claim that these views are those of the Statistics Department or of Purdue University. Herman Rubin, Dept. of Statistics, Purdue Univ., West Lafayette IN47907-1399 [EMAIL PROTECTED] Phone: (765)494-6054 FAX: (765)494-0558 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
