T-TEST

T-TEST is available in the Statistics Base option.

T-TEST compares sample means by calculating Student’s t and displays the two-tailed probability of the difference between the means. Statistics are available for one-sample (tested against a specified value), independent samples (different groups of cases), or paired samples (different variables).

One-sample tests:

T-TEST TESTVAL n /VARIABLE=varlist

Independent-samples tests:

T-TEST GROUPS=varname ({1,2**      }) /VARIABLES=varlist 
                       {value      }
                       {value,value}

Paired-samples tests:

T-TEST PAIRS=varlist [WITH varlist [(PAIRED)]] [/varlist ...]

All types of tests:

[/MISSING={ANALYSIS**}  [INCLUDE]]  
          {LISTWISE  }
 
[/CRITERIA=CI({0.95**})
              {value }

**Default if the subcommand is omitted.

This command reads the active dataset and causes execution of any pending commands. See the topic Command Order for more information.

Syntax for the T-TEST command can be generated from the One-Sample T Test , Independent-Samples T Test , or Paired-Samples T Test dialog boxes.

Examples

T-TEST GROUPS=WORLD(1,3) /VARIABLES=NTCPRI NTCSAL NTCPUR.

T-TEST PAIRS=TEACHER CONSTRUC MANAGER.