Base SAS 9.1 Procedures Guide, Volumes 1, 2, 3 and 4

Overview: STANDARD Procedure

What Does the STANDARD Procedure Do?

The STANDARD procedure standardizes variables in a SAS data set to a given mean and standard deviation, and it creates a new SAS data set containing the standardized values.

Standardizing Data

Output 46.1 shows a simple standardization where the output data set contains standardized student exam scores. The statements that produce the output follow:

proc standard data=score mean=75 std=5 out=stndtest; run; proc print data=stndtest; run;

Output 46.1: Standardized Test Scores Using PROC STANDARD

The SAS System 1 Obs Student Test1 1 Capalleti 80.5388 2 Dubose 64.3918 3 Engles 80.9143 4 Grant 68.8980 5 Krupski 75.2816 6 Lundsford 79.7877 7 McBane 73.4041 8 Mullen 78.6612 9 Nguyen 74.9061 10 Patel 71.9020 11 Si 73.4041 12 Tanaka 77.9102

 

Output 46.2 shows a more complex example that uses BY- group processing. PROC STANDARD computes Z scores separately for two BY groups by standardizing life-expectancy data to a mean of 0 and a standard deviation of 1. The data are 1950 and 1993 life expectancies at birth for 16 countries . The birth rates for each country, classified as stable or rapid, form the two BY groups. The statements that produce the analysis also

For an explanation of the program that produces this output, see Example 2 on page 1187.

Output 46.2: Z Scores for Each BY Group Using PROC STANDARD

Life Expectancies by Birth Rate 2 -------------------- PopulationRate=Stable -------------------- The STANDARD Procedure Standard Name Mean Deviation N Label Life50 67.400000 1.854724 5 1950 life expectancy Life93 74.500000 4.888763 6 1993 life expectancy --------------------- PopulationRate=Rapid -------------------- Standard Name Mean Deviation N Label Life50 42.000000 5.033223 8 1950 life expectancy Life93 59.100000 8.225300 10 1993 life expectancy

 

Standardized Life Expectancies at Birth 3 by a Countrys Birth Rate Population Rate Country Life50 Life93 Stable France -0.21567 0.51138 Stable Germany 0.32350 0.10228 Stable Japan -1.83316 0.92048 Stable Russia 0.00000 -1.94323 Stable United Kingdom 0.86266 0.30683 Stable United States 0.86266 0.10228 Rapid Bangladesh 0.00000 -0.74161 Rapid Brazil 1.78812 0.96045 Rapid China -0.19868 1.32518 Rapid Egypt 0.00000 0.10942 Rapid Ethiopia -1.78812 -1.59265 Rapid India -0.59604 -0.01216 Rapid Indonesia -0.79472 -0.01216 Rapid Mozambique 0.00000 -1.47107 Rapid Philippines 1.19208 0.59572 Rapid Turkey 0.39736 0.83888

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