The NGAGE 1.0 study, conducted by Ipsos for NCPG in 2018, examined gambling prevalence rates across the United States through comprehensive online surveys. Here's a detailed breakdown of the methodology:

Survey Implementation

• Conducted from November 8-29, 2018
• Available in English and Spanish
• Device-responsive design (computer, smartphone, tablet)
• Coverage: Continental US, Alaska, and Hawaii

Sample Composition and Size

• National sample: 3,000 adults
• Representative of US population demographics
• State-level samples: Up to 500 adults per state
• Sports bettor subset identified for additional analysis

Quality Control Measures

• Demographic quotas during fielding
• Post-fieldwork weighting for educational attainment
• Aligned with US Census Bureau figures
• Managed by Ipsos with NCPG collaboration

Statistical Reliability Credibility intervals:

• National sample (3,000): ±2.0%
• Sample of 1,000: ±3.5%
• Sample of 500: ±5.0%
• Sample of 200: ±7.9%

Sampling Sources

• Primary: Ipsos online consumer panels
• Secondary: Additional market research industry panels
• Balanced state population distribution
• Demographic representation maintained

Note: Results may be subject to coverage and measurement error, common to all sample surveys and polls.

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