‰HDF  ÿÿÿÿÿÿÿÿHMÿÿÿÿÿÿÿÿ`ˆ¨ ÈTREEÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ¨ HEAPX Èdatadata_descr8ˆ¨ 0name pollution (mldata0 @commentThis is the pollution data so loved by writers of papers on ridge regression. Source: McDonald, G.C. and Schwing, R.C. (1973) 'Instabilities of regression estimates relating air pollution to mortality', Technometrics, vol.15, 463- Variables in order: PREC Average annual precipitation in inches JANT Average January temperature in degrees F JULT Same for July OVR65 % of 1960 SMSA population aged 65 or older POPN Average household size EDUC Median school years completed by those over 22 HOUS % of housing units which are sound & with all facilities DENS Population per sq. mile in urbanized areas, 1960 NONW % non-white population in urbanized areas, 1960 WWDRK % employed in white collar occupations POOR % of families with income < $3000 HC Relative hydrocarbon pollution potential NOX Same for nitric oxides SO@ Same for sulphur dioxide HUMID Annual average % relative humidity at 1pm MORT Total age-adjusted mortality rate per 100,000 Information about the dataset CLASSTYPE: numeric CLASSINDEX: none specific 0 TREEÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ HEAPX8P int4int0int2double3double1double5 SNODèÈ <HÀÕL€SNOD(x h0ˆHXð + X4   ˆ&!)-8 �7i A &  ? #?%  ; B«   ;'!ÎH>%’@|   ! ‚Á"}Nl¡,Y0DV f*1';9687688=;8:9<:6:&;=5=58;<76/9;<@:8:>:68I865<9=GGH8=;<46886:$#,/+5+-$$4!(#%#$*+.'#+ 2<-.6**$%*), "  #-&()--*&-#-*".-(7 5#*C (6! &!' 701(% !!GHJOMPJIFHOLMGKUKIJHUHMHTKQJDGRREIPHQMLHCHMNHOF?D@JHIGNQLFLH« ¹¤5 )ý G\¶uþêâ £¡½Øân4š Ý] W <¾ Ž \z© 1v /z ÿ d &Ìm ; ´ ë¸(Ù �Ž *[;± ‡¼QP ^ã%{ ˜¸ <ÐÕL€ <ØðÕLˆ ?@4 4ÿ<H ÕLx ?@4 4ÿ<è#€ÕLx ?@4 4ÿ<h+àÕL€TREEÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿX. 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