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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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CSDESCRIPTIVES 333<br />

• Plan file and subpopulation variables may not be specified on the SUMMARY subcommand.<br />

VARIABLES Specifies the variables used by the MEAN and SUM subcommands.<br />

MEAN Subcommand<br />

The MEAN subcommand is used to request that means be estimated for variables specified on<br />

the SUMMARY subcommand.<br />

The TTEST keyword requests t tests of the population means(s) and gives the null hypothesis<br />

value(s). If subpopulations are defined on the SUBPOP subcommand, then null hypothesis<br />

values are used in the test(s) for each subpopulation as well as for the entire population.<br />

value The null hypothesis is that the population mean equals the specified value for<br />

all t tests.<br />

valuelist This list gives the null hypothesis value of the population mean for each variable<br />

on the SUMMARY subcommand. The number and order of values must<br />

correspond to the variables on the SUMMARY subcommand.<br />

SUM Subcommand<br />

Commas or spaces must be used to separate the values.<br />

The SUM subcommand is used to request that sums be estimated for variables specified on<br />

the SUMMARY subcommand.<br />

The TTEST keyword requests t tests of the population sum(s) and gives the null hypothesis<br />

value(s). If subpopulations are defined on the SUBPOP subcommand, then null hypothesis<br />

values are used in the test(s) for each subpopulation as well as for the entire population.<br />

value The null hypothesis is that the population sum equals the specified value for<br />

all t tests.<br />

valuelist This list gives the null hypothesis value of the population sum for each variable<br />

on the SUMMARY subcommand. The number and order of values must<br />

correspond to the variables on the SUMMARY subcommand.<br />

RATIO Subcommand<br />

Commas or spaces must be used to separate the values.<br />

The RATIO subcommand is used to specify ratios of variables to be estimated.<br />

• Ratios are defined by crossing variables on the NUMERATOR keyword with variables on<br />

the DENOMINATOR keyword, with DENOMINATOR variables looping fastest irrespective<br />

of the order of the keywords.

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