PAIR Subcommand (BAYES RELATED command)

PAIR specifies the pairs of variables. At least one /PAIR is required. Multiple /PAIR subcommands are allowed.

Known variance

VARIABLES = varname2 pairname 2. Specify the names of two related variables under testing. The parameter is required. You must specify two variable names per pair.

[VARIANCE = value]. Specify the variance of (varname1−pairname1), if known. Only a single, positive value is allowed. The parameter is optional. When VARIANCE is specified for a /PAIR subcommand:
  • VARDIST, if specified, has no effect on VARIABLES that are specified for the /PAIR subcommand.
  • When MEANDIST = NORMAL(value1 value2), both value1 and value2 are required.
When VARIANCE is not specified for a /PAIR subcommand:
  • VARDIST or PRECDIST must be specified.
  • When VARDIST = INVCHISQ or INVGAMMA, or PRECDIST = GAMMA or CHISQ:
    • When MEANDIST = NORMAL(value1 value2), only value1 takes effect, and value2 is ignored.
    • When MEANDIST = DIFFUSE, VARDIST or PRECDIST is ignored, and VARDIST = DIFFUSE is used.
  • When VARDIST = DIFFUSE, JEFFREYS2, or JEFFREYS4:
    • When MEANDIST = NORMAL(value1 value2), NORMAL is ignored, and MEANDIST = DIFFUSE is used.

NULLVALUE = value. Specify the null value in the Bayes factor estimation. The parameter is required. Only one value is allowed (the default value is 0) and the parameter is valid only when DISTRIBUTION = NORMAL.

ALTERGVALUE = value. Specify the value to define ψ2 = gσ2x in the Bayes factor estimation. Only one value > 0 is allowed and the parameter is valid only when DISTRIBUTION = NORMAL. When VARIANCE is specified, the parameter must be specified with 1 as the default setting. When VARIANCE is not specified, you can either specify a fixed g or omit the value to integrate it out.

Unknown variance

VARIABLES = varname2 pairname 2. Specify the names of two related variables under testing. The parameter is required. You must specify two variable names per pair.

NULLVALUE = value. Specify the null value in the Bayes factor estimation. The parameter is required. Only one value is allowed (the default value is 0) and the parameter is valid only when DISTRIBUTION = NORMAL.

[ALTERGVALUE = value]. Specify the value to define ψ2 = gσ2x in the Bayes factor estimation. Only one value > 0 is allowed and the parameter is valid only when DISTRIBUTION = NORMAL. When VARIANCE is specified, the parameter must be specified with 1 as the default setting. When VARIANCE is not specified, you can either specify a fixed g or omit the value to integrate it out.