TY  - CHAP
M1  - Book, Section
TI  - Descriptive Statistics
A1  - Portney, Leslie G.
A1  - Watkins, Mary P.
PY  - 2017
T2  - Foundations of Clinical Research: Applications to Practice, 3e
AB  - In  the  investigation  of  most  clinical  research  questions,  some  form  of  quantitative  data  will  be  collected.  Initially  these  data  exist  in  raw  form,  which  means  that  they  are  nothing  more  than  a  compilation  of  numbers  representing  empirical  observations  from  a  group  of  individuals.  For  these  data  to  be  useful  as  measures  of  group  performance,  they  must  be  organized,  summarized,  and  analyzed,  so  that  their  meaning  can  be  communicated.  These  are  the  functions  of  the  branch  of  mathematics  called  statistics.  Descriptive  statistics  are  used  to  characterize  the  shape,  central  tendency,  and  variability  within  a  set  of  data,  often  with  the  intent  to  describe  a  population.  Measures  of  population  characteristics  are  called  parameters.  A  descriptive  index  computed  from  sample  data  is  called  a  statistic.  When  researchers  generalize  sample  data  to  populations,  they  use  statistics  to  estimate  population  parameters.  In  this  chapter  we  introduce  the  basic  elements  of  statistical  analysis  for  describing  quantitative  data.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/20
UR  - fadavispt.mhmedical.com/content.aspx?aid=1138251709
ER  -