I want to obtain a reference range normogram of fetal neck circumference and fetal neck area by gestational age.
I'd also like to obtain the 5th, 50th, and 95th percentiles for clinical reference purposes.
Spss may not be of all help in this case, you may consider R package mfp
Very grateful for your suggestion.
http://www.ats.ucla.edu/stat/spss/examples/asa2/chap5.htm
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