In the sas example, proc univariate data=Heights ciquantnormal(alpha=.1);
var Height;
run; calcualtes the confidence interval for quantiles, while proc univariate data=Heights cibasic(alpha=.1);
var Height;
run; calcualtes the confidence interval for mean. I find that the confidence interval for 50% quantile is the same as that of mean. I am a little confused by this.
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