I have posted the data set of salary of school teachers for all states in the USA. Categorize all the states in four regions. Region 1: Northern States, Region 2: Southern States, Region 3: Eastern States, and Region 4: Western States.

is.xls

Sheet1

TABLE 10-4
REGIONAL DIFFERENCES IN PUBLIC SCHOOL TEACHERS' SALARIES, 1985
Pay =Average annual salary of public school teachers
PPS=Per pupil spending by public authorities
Area: 1=Northeast and North Central region
2=South
3=West		4=East
Dummy: D1 = 1 = Northeast and North Central Region
= 0 = Other regions
D2 = 1 = South
= 0 = Other regions
D3 = 1 = West
= 0 = other regions
State	Pay	PPS	AREA	D1	D2	D3
ME	19583	3346	4	1	0	0
NH	20263	3114	4	1	0	0
VT	20325	3554	4	1	0	0
MA	26800	4642	4	1	0	0
RI	29470	4669	4	1	0	0
CT	26610	4888	4	1	0	0
NY	30678	5710	4	1	0	0
NJ	27170	5536	4	1	0	0
PA	25853	4168	4	1	0	0
OH	24500	3547	4	1	0	0
IN	24274	3159	4	1	0	0
IL	27170	3621	4	1	0	0
MI	30168	3782	4	1	0	0
WI	26525	4247	4	1	0	0
MN	27360	3982	1	1	0	0
IA	21690	3568	1	1	0	0
MO	21974	3155	1	1	0	0
ND	20816	3059	1	1	0	0
SD	18095	2967	1	1	0	0
NE	20939	3285	1	1	0	0
KS	22644	3914	1	1	0	0
DE	24624	4517	4	0	1	0
MD	27186	4349	4	0	1	0
DC	33990	5020	4	0	1	0
VA	23382	3594	4	0	1	0
WV	20627	2821	4	0	1	0
NC	22795	3366	4	0	1	0
SC	21570	2920	4	0	1	0
GA	22080	2980	4	0	1	0
FL	22250	3731	4	0	1	0
KY	20940	2853	4	0	1	0
TN	21800	2533	4	0	1	0
AL	22934	2729	4	0	1	0
MS	18443	2305	4	0	1	0
AR	19538	2642	2	0	1	0
LA	20460	3124	4	0	1	0
OK	21419	2752	2	0	1	0
TX	25160	3429	2	0	1	0
MT	22482	3947	3	0	0	1
ID	20969	2509	3	0	0	1
WY	27224	5440	3	0	0	1
CO	25892	4042	3	0	0	1
NM	22644	3402	3	0	0	1
AZ	24640	2829	3	0	0	1
UT	22341	2297	3	0	0	1
NV	25610	2932	3	0	0	1
WA	26015	3705	3	0	0	1
OR	25788	4123	3	0	0	1
CA	29132	3608	3	0	0	1
AK	41480	8349	3	0	0	1
HA	25845	3766	3	0	0	1