/* Sample SAS code and data for problem 2.40 */

DATA satscore;

INPUT state $ sat1990 sat2000;
differ = sat2000 - sat1990;

cards;

Alabama         1079      1114
Alaska          1015      1034
Arizona         1041      1044
Arkansas        1077      1117
California      1002      1015
Colorado        1067      1071
Connecticu      1002      1017
Delaware        1006       998
D.C.             950       980
Florida          988       998
Georgia          951       974
Hawaii           985      1007
Idaho           1066      1081
Illinois        1089      1154
Indiana          972       999
Iowa            1172      1189
Kansas          1129      1154
Kentucky        1089      1098
Louisiana       1088      1120
Maine            991      1004
Maryland        1008      1016
Massachuse      1001      1024
Michigan        1063      1126
Minnesota       1110      1175
Mississipp      1090      1111
Missouri        1089      1149
Montana         1082      1089
Nebraska        1121      1131
Nevada          1022      1027
NHampshire      1028      1039
NJersey          993      1011
NMexico         1100      1092
NewYork          985      1000
NCarolina        948       988
NDakota         1157      1197
Ohio            1048      1072
Oklahoma        1095      1123
Oregon          1024      1054
Pennsylvan       987       995
RIsland          986      1005
SCarolina        942       966
SDakota         1150      1175
Tennessee       1102      1116
Texas            979       993
Utah            1121      1139
Vermont         1000      1021
Virginia         997      1009
Washington      1024      1054
WestVA          1034      1037
Wisconsin       1111      1181
Wyoming         1072      1090

;

title 'Problem 2.40: SAT scores';

proc insight;
open satscore;
dist sat1990 sat2000;
run;

/* To produce side-by-side histograms of sat1990 and sat2000: */
/* After running PROC INSIGHT and before closing the PROC INSIGHT displays, */
/* click on the "Analyze" menu, then choose "Histogram/Bar Chart". */
/* Click SAT1990, then click "Y".  Click SAT2000, then click "Y" again. */
/* Click "OK".  Two histograms side by side should appear. */

proc insight;
open satscore;
dist differ;
run;