Here are presidential race results from battleground states polled by Mason-Dixon Polling and Research for MSNBC and Knight Ridder and other news organizations.
Polling methodology
Arkansas:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Arkansas voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Colorado:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 25 through October 29, 2004. A total of 625 registered Colorado voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect the voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a regional or gender grouping.
Florida:
The Mason-Dixon Florida Poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004. A total of 800 registered voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized and quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 3.5 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if all voters were surveyed. The margin for error is higher for any subgroup, such as a regional or party grouping.
Iowa:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for the Santa Fe New Mexican and KOB-TV. A total of 625 registered Iowa voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Michigan:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 626 registered Michigan voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Minnesota:
The Mason-Dixon Minnesota Poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 27 through October 29, 2004 for the St. Paul Pioneer Press. A total of 625 registered Minnesota voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a regional or gender grouping.
Missouri:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Missouri voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Nevada:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for the Las Vegas Review-Journal and Reviewjournal.com. A total of 800 registered Nevada voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
New Hampshire:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered New Hampshire voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
New Mexico:
The Mason-Dixon New Mexico Poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 27 through October 29, 2004 for the Santa Fe New Mexican and KOB-TV. A total of 625 registered voters were interviewed statewide by telephone. All indicated they were likely to vote in the November election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a regional or gender grouping.
Ohio:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Ohio voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Oregon:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Oregon voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Pennsylvania:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Pennsylvania voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
West Virginia:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered West Virginia voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.
Wisconsin:
This poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 26 through October 29, 2004 for MSNBC and Knight Ridder. A total of 625 registered Wisconsin voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election.
Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized in order to ensure an accurate reflection of the state. Quotas were assigned to reflect voter turn-out by county.
The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if the entire population were sampled. The margin for error is higher for any subgroup, such as a gender or regional grouping.