TY  - CHAP
M1  - Book, Section
TI  - Comparing Two Means: The t-Test
A1  - Portney, Leslie G.
A1  - Watkins, Mary P.
PY  - 2017
T2  - Foundations of Clinical Research: Applications to Practice, 3e
AB  - The  simplest  experimental  comparison  involves  the  use  of  two  independent  groups  created  by  random  assignment.  This  design  allows  the  researcher  to  assume  that  all  individual  differences  are  evenly  distributed  between  the  groups,  so  that  the  groups  are  equivalent  at  the  start  of  the  experiment.  Statistically,  the  groups  are  considered  random  samples  of  the  same  population,  and  therefore,  any  observed  differences  among  them  should  be  the  result  of  sampling  error  or  chance.  After  the  application  of  a  treatment  variable  to  one  group,  the  researcher  wants  to  determine  if  the  groups  are  still  from  the  same  population,  or  if  their  means  can  be  considered  significantly  different.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/23
UR  - fadavispt.mhmedical.com/content.aspx?aid=1138252014
ER  -