THE NEGATIVE EXPONENTIAL WITH CUMULATIVE ERROR.
Abstract
In certain tracer experiments, a biologist may inject a tagged substance in an animal and, among other things, measure the fraction of material excreted in the urine each day. Assuming the true value to be a negative exponential in time, two error models (homoscedastic vs. proportional error) and two methods of analysis (incremental vs. cumulative) are compared. The general conclusion is that one should be fairly sure which model is appropriate and should have a reasonable notion of the size of the rate constant beta relative to the length of the experimental run before attempting to estimate beta from a logarithmic transformation of the periodic increments or of the cumulative amount remaining. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0667789
Entities
People
- Harry M. Hughes
- M. Bryan Danford
Organizations
- United States Air Force School of Aerospace Medicine