Dummy variables	Significant level 5%			Significant level 10%
Dummy variables	No. of significant	No. of significant and positive	No. of significant and negative	No. of significant	No. of significant and positive	No. of significant and negative
b1	46	32	14	65	45	20
b2	42	39	3	59	49	10
b3	39	10	29	54	14	40
b4	23	13	10	43	20	23
b5	54	9	45	69	11	58
b6	9	5	4	22	11	11
b7	24	17	7	41	29	12
b8	28	12	16	36	18	18
b9	27	10	17	45	20	25
b10	27	13	14	36	14	22
b11	29	14	15	44	19	25
Total	348	174	174	514	250	264