BOOTSTRAP ANALYSIS OF SPEARMAN RANK CORRELATION FOR EFRON LAW SCHOOL DATA SET (1,000 SAMPLES)
>corr
>graph none
>print none
>use law
>rseed=414123
>save temp
>spearman lsat gpa/sample=boot(1000,15) Spearman correlation matrix LSAT GPA LSAT 1.000000 GPA 0.803636 1.000000 Number of observations: 15 Spearman correlation matrix LSAT GPA LSAT 1.000000 GPA 0.663082 1.000000 Number of observations: 15 <...zillions of correlation matrices omitted ...>
<The print=none option does not seem to inhibit this output> Spearman correlation matrix LSAT GPA LSAT 1.000000 GPA 0.794964 1.000000 Number of observations: 15 Matrix has been saved. >basic File in use is law.SYD. Variables in the SYSTAT Rectangular file are: LSAT GPA BASIC statements cleared. >use temp BASIC statements cleared. >type=rectangular >if case<>2*int(case/2) then delete >rem get rid of odd rows in stacked correlation matrices >save blaw >run SYSTAT file created. 1000 cases and 2 variables processed and saved. BASIC statements cleared. >sort lsat 1000 cases and 2 variables processed. >if case=975 then print "95% CI Upper:", lsat >if case=25 then print "95% CI Lower:", lsat >output text2.txt >run 95% CI Lower: 0.470270 95% CI Upper: 0.963437 SYSTAT file created. 1000 cases and 2 variables processed. BASIC statements cleared. >density lsat/stick >stats >stat LSAT GPA N of cases 1000 1000 Minimum 0.045704 1.000000 Maximum 1.000000 1.000000 Mean 0.768157 1.000000 Standard Dev 0.126460 0.0 >corr >use law >rem get the Spearman correlation for the original sample >spearman Spearman correlation matrix LSAT GPA LSAT 1.000000 GPA 0.796429 1.000000 Number of observations: 15 >plot gpa*lsat/stick
Last modified 28 April 1999