NCPG and Ipsos conducted a comprehensive national gambling study in 2018, known as NGAGE 1.0, to examine gambling prevalence rates across the United States. Here's a detailed breakdown of the research methodology:

Survey Implementation:

• Online survey conducted from November 8-29, 2018
• Available in English and Spanish
• Device-responsive design (computer, smartphone, tablet)
• Used Ipsos and other market research panel sources
• Coverage: Continental US, Alaska, and Hawaii

National Sample Characteristics:

• 3,000 adults surveyed
• Representative of US population distribution
• Controlled quotas for gender, age, and Hispanic/non-Hispanic proportions
• Post-fieldwork weighting for educational attainment
• Aligned with US Census Bureau demographics

State-Level Analysis:

• Additional state-specific samples collected
• Target of 500 adults per state
• Some states had smaller samples due to population size
• Combined national and state-specific data for comprehensive analysis

Sports Betting Focus:

• Identified sports bettors through specific activity questions
• Measured sports betting incidence in general population
• Enhanced state-level samples for comparative analysis

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%

Potential limitations include coverage error and measurement error, common to all sample surveys.

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