2006 CANDIDATES
Sheldon Whitehouse
Lincoln Chaffee

DATE 1					MOE 2	S 3
NOV 3		46.8	53.2	-	+/- 1.7	3138
NOV 1		46.1	53.9	-	+/- 1.9	2758
OCT 25		46.5	53.5	-	+/- 2.0	2399
OCT 20		46.4	53.6	-	+/- 1.9	2591
OCT 10		46.7	53.3	-	+/- 1.9	2784

DATE 1	POLLSTER				MOE 2	S 3
NOV 3	USA TODAY/GALLUP	48.4	51.6	-	+/- 3.3	880
NOV 1	MASON-DIXON	50.5	49.5	-	+/- 3.9	625
OCT 31	REUTERS/ZOGBY	42.4	57.6	-	+/- 4.0	600
OCT 25	RHODE ISLAND COLLEGE	43.4	56.6	-	+/- 4.9	408
OCT 20	MASON-DIXON	47.3	52.7	-	+/- 3.9	625
OCT 19	RASMUSSEN	45.7	54.3	-	+/- 4.4	500
OCT 14	WPRI	47.7	52.3	-	+/- 4.9	407
OCT 10	RHODE ISLAND COLLEGE	48.1	51.9	-	+/- 4.6	459
OCT 6	USATODAY/GALLUP	43.8	56.2	-	+/- 4.0	600
OCT 5	REUTERS/ZOGBY	47.7	52.3	-	+/- 4.0	600
OCT 4	RASMUSSEN	44.3	55.7	-	+/- 4.4	500
SEP 28	MASON-DIXON	49.4	50.6	-	+/- 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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