RT Book, Section
A1 Glantz, Stanton A.
SR Print(0)
ID 57415527
T1 Chapter 8. How to Test for Trends
T2 Primer of Biostatistics, 7e
YR 2012
FD 2012
PB The McGraw-Hill Companies
PP New York, NY
SN 978-0-07-178150-3
LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=57415527
RD 2024/04/19
AB The  first  statistical  problem  we  posed  in  this  book,  in  connection  with  Figure  1-2A,  dealt  with  a  drug  that  was  thought  to  be  a  diuretic,  but  that  experiment  cannot  be  analyzed  using  our  existing  procedures.  In  it,  we  selected  different  people  and  gave  them  different  doses  of  the  diuretic,  then  measured  their  urine  output.  The  people  who  received  larger  doses  produced  more  urine.  The  statistical  question  is  whether  the  resulting  pattern  of  points  relating  urine  production  to  drug  dose  provided  sufficient  evidence  to  conclude  that  the  drug  increased  urine  production  in  proportion  to  drug  dose.  This  chapter  develops  the  tools  for  analyzing  such  experiments.  We  will  estimate  how  much  one  variable  increases  (or  decreases)  on  the  average  as  another  variable  changes  with  a  regression  line  and  quantifies  the  strength  of  the  association  with  a  correlation  coefficient.*