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1
SPSS MACROS FOR COMPUTING STANDARD ERRORS WITHOUT PLAUSIBLE VALUES
Pseudo-stratum
School R1 R2 R3 R4 R5 R6 R7 R8
1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
1 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
2 3 1.5 0.5 1.5 0.5 1.5 0.5 1.5 0.5
2 4 0.5 1.5 0.5 1.5 0.5 1.5 0.5 1.5
3 5 1.5 1.5 0.5 0.5 1.5 1.5 0.5 0.5
3 6 0.5 0.5 1.5 1.5 0.5 0.5 1.5 1.5
4 7 1.5 0.5 0.5 1.5 1.5 0.5 0.5 1.5
4 8 0.5 1.5 1.5 0.5 0.5 1.5 1.5 0.5
5 9 1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5
5 10 0.5 0.5 0.5 0.5 1.5 1.5 1.5 1.5
• PISA Replication methods for multistage sample : Fays method
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Computation of Standard Errors
2
3
• PISA2009 SAS student data file
Computation of Standard Errors
• Student Final Weight : W_FSTUWT
• 80 replicates : W_FSTR1 to W_FSTR80
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• How to weight the data in SPSS?
Computation of Standard Errors
5
Computation of Standard Errors
• How to weight the data in SPSS?
• SPSS uses as denominator for estimating STD
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Computation of Standard Errors
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Computation of statistic for the 80 replicates …
7
Computation of Standard Errors
8
• Structure of SPSS macros for the computation of SE:– Selection of variables (DEP=)– Iteration of the SPSS procedure on the final
weight and 80 (default) replicates (NREP=)– Data files manipulation and computation of the
SE– Computation of limits if required– Selection of statistics (STAT=)
Computation of Standard Errors
9
Computation of Standard Errors
10
• Use of the limit criteria– Number of students– Number of schools– Number of variables of the BYVAR statement
for defining the population of reference
Computation of Standard Errors
11
Computation of Standard Errors
StdDev and SE of HISEI by CNT and Gender
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Computation of Standard Errors
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• SPSS macros for:– Univariate statistics
• Means (MCR_SE_UNIV)• Percentages (MCR_SE_GrpPct)
– Multivariate statistics• Correlation (MCR_SE_COR)• Regression (MCR_SE_REG)
Computation of Standard Errors
14
Computation of Standard Errors
Percentage of students by grade (ST01Q01) within Country and Gender categories
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Computation of Standard Errors
Percentage of students by grade (ST01Q01) within countries and Gender categories
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Computation of Standard Errors
Correlation between ESCS and MATHEFF by gender
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Computation of Standard Errors
1
2
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Computation of Standard Errors
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ESCSJR
ESCSESCSJR
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GenderxHISEIGenderESCSJR
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