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The Maryland Poll: July 2006 Benchmark

 

Objectives

 

Potomac Survey Research was commissioned by The (Baltimore) Sun to conduct a benchmark telephone survey on issues and politics among likely voters in Maryland.

 

The survey instrument was designed to measure: 

  • Economic Mood
  • Job performance of President Bush and Governor Ehrlich
  • What to do in Iraq
  • Most important issue facing the state
  • Assessment of Special Session
  • Potency of Electricity Rates issue
  • 2006 Democratic primary match-ups for Comptroller, Attorney General, and U.S. Senator
  • 2006 general election match-ups for Governor and U.S. Senator
  • Comparisons between Bob Ehrlich and Martin O’Malley
  • Demographics

Overview and Sampling Error

 

Potomac completed a total of 1,200 telephone interviews statewide, July 6 – July 10, 2006, among a random sampling of likely-voting Maryland registered voters. 

 

According to customary statistical standards, the statewide sample produces a margin of error of no more than ± 2.8% at a 95% confidence level.  This means that, 95 percent of the time, the “true” figure would fall within this range if every likely voter in the state had been interviewed. 

 

For smaller subgroups of the overall sample, the potential sampling error is larger.  For example, the sub-sample of 604 likely Democratic primary voters has a potential margin of sampling error of ± 4.1%. The following chart outlines the maximum sampling error associated with sub-samples of varying sizes:

 

 

Sample Size

Sampling Error *

1,000

± 3.2%

800

± 3.5%

600

± 4.1%

400

± 5.0%

300

± 5.8%

200

± 7.1%

150

± 8.2%

100

± 9.8%

  

* At the 95% confidence limit.

 

Margin of sampling error is only one of many potential sources of error in this or any other public opinion survey.  The practical difficulties of conducting any survey of public opinion introduce other sources of error into the study.  Variations in question wording or the order of the questions, for instance, can lead to somewhat different results.

 

Sampling

 

The survey sample was drawn from an electronic database of Maryland registered voters and matched with telephone numbers by a commercial vendor.  The use of a voter file is preferred because it ensures the exclusion from the survey sample of residents who are not registered to vote.  Voter history codes on the file allow a pre-election sample to be targeted to voters who have a proven track-record of voting in past elections.

 

Strict geographic, partisan, and gender and ethnic sampling quotas were adhered to throughout the interviewing process to reflect the proper distribution of registered voters statewide.  These quotas are outlined later in this section of the report.

 

Telephone Interviewing

 

Our field staff of professionally-trained and supervised callers completed the telephone interviews on the evenings of July 6 – July 10.  Calls were made between 5:00 and 9:30 p.m. weekdays, 10:00 a.m. and 6:00 p.m. Saturday, and 1:00 and 9:00 p.m. Sunday Eastern time.  The survey length averaged approximately 6-1/2 minutes.

 

Suggested Language for Statement of Methodology

 

This Maryland Poll, sponsored by The (Baltimore) Sun, was conducted by telephone among a random cross-section of 1,200 likely Maryland voters, July 6 – July 10, 2006.  A statewide list of registered voters was used and matched with telephone numbers to ensure that non-registrants were excluded from the sample.  Throughout the interviewing process, strict geographic, political party, and gender and ethnic sampling quotas were maintained, and the sample was weighted so that it accurately reflected the likely demographic make-up of the statewide electorate.  The maximum margin of error for the statewide sample is plus or minus 2.8% at a 95% confidence level.  For smaller subgroups the potential sampling error is larger.  The survey was conducted by Potomac Incorporated of Bethesda, Maryland.

 

2006 Maryland Poll Methodology Information

301-656-7900

 

 

Click to access a PDF file of Potomac's Summary Charts
 
Click to access a PDF file of The Sun article:
Governor is Running Stronger

Click to access a PDF file of The Sun article: Clear Divisions on Issues
Click to access a PDF file of The Sun article: Rate Worries May Lead to an Electric Election
Click to access a PDF file of The Sun article: Cardin, Mfume in Senate Tossup
Click to access a PDF file of The Sun article: Iraq is Drag on Bush’s Ratings
Click to access a PDF file of The Sun article: Attorney General: No Favorite in Race
Click to access a PDF file of The Sun article: Poll Indicates County Could be Election Key
Click to access a PDF file of The Sun article: Schaefer Not Far Ahead of Rivals

 

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