2006 CANDIDATES
Sherrod Brown
R. Michael DeWine
George Mays

DATE 1					MOE 2	S 3
NOV 5		42.2	57.2	0.6	+/- 1.5	4276
OCT 29		42.8	55.0	2.2	+/- 1.9	2737
OCT 25		42.2	55.8	2.0	+/- 1.7	3285
OCT 15		43.5	55.4	1.1	+/- 1.8	3131
OCT 12		46.1	52.1	1.8	+/- 1.9	2740

DATE 1	POLLSTER				MOE 2	S 3
NOV 5	SURVEY USA	43.8	56.3	0.0	+/- 4.7	436
NOV 5	UNIVERSITY OF CINCINNATI	44.0	56.0	0.0	+/- 3.0	1074
NOV 3	COLUMBUS DISPATCH	38.0	62.0	0.0	+/- 2.5	1541
NOV 2	MASON-DIXON	46.3	52.6	1.1	+/- 3.9	625
OCT 31	REUTERS/ZOGBY	44.7	52.1	3.2	+/- 4.0	600
OCT 29	CNN	43.9	55.1	1.0	+/- 4.2	542
OCT 25	RASMUSSEN	43.9	55.1	1.0	+/- 4.4	500
OCT 25	SURVEY USA	38.5	59.4	2.1	+/- 4.1	563
OCT 23	LA TIMES/BLOOMBERG	43.8	52.8	3.4	+/- 4.4	507
OCT 20	MASON-DIXON	44.0	52.7	3.3	+/- 3.9	625
OCT 15	CBS/NYT	41.2	57.6	1.2	+/- 3.7	689
OCT 15	QUINNIPIAC	43.2	55.8	1.1	+/- 3.3	901
OCT 14	U CINCINNATI	45.9	53.1	1.0	+/- 4.3	526
OCT 12	RASMUSSEN	47.7	51.1	1.1	+/- 4.4	500
OCT 11	SURVEY USA	42.1	56.8	1.1	+/- 4.3	515
OCT 4	RASMUSSEN	44.6	53.3	2.2	+/- 4.4	500
OCT 2	REUTERS/ZOGBY	48.8	48.8	2.4	+/- 4.0	600
SEP 27	MASON-DIXON	47.8	50.0	2.2	+/- 3.9	625

NOTES
¹ Date is the last day that the poll was taken. Often polls are embargoed for several days until their release date.
² Margin of Error. MOE is related to sample size, 0.98 divided by the square root of the sample size at 95% confidence (19 times out of 20). For example, a sample of 1000 people has a MOE of +/- 3.1% and a sample of 2000 people has a MOE of +/- 2.2%. For rolling averages, the samples are assumed to be independent, thus sample sizes are aggregated to produce an overall MOE. In practice, some polling firms use lists with repeat calls; in these case, it is more precise to reduct these repeat calls from the overall sample size, thus the actual margin of error might be slightly higher. Example: 5 surveys of 1000 people would normally produce a MOE of +/- 1.4%, if samples were independent. If 25% of calls were repeat calls, however, a more accurate MOE would be based on 4000, not 5000, people, producing a MOE of +/- 1.5%.
³ Sample size.
⁴ Poll numbers exclude undecided voters (and in some cases include estimated for Others), thus are pro-rated to 100%. For example, if the raw poll data shows the Republican candidate with 47%, the Democratic candidate with 41%, Others with 2% and there were 10% undecided, the results excluding undecideds are: Republican 47/90 = 52.2, Democrat 41/90 = 45.6, Others 2/90 = 2.2.

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