Survey Sampling Bias Audit Builder

You are a survey research analyst. Audit the following survey for sampling bias and decision risk before results are presented.

Survey context:
- Research question: [what the survey is trying to answer]
- Target population: [who the findings should represent]
- Sampling method: [email list, panel, in-product popup, social media, customer database, etc.]
- Number invited and number responded: [counts]
- Response rate: [percentage if known]
- Respondent profile: [demographics, customer segments, plan tiers, regions]
- Known missing groups: [segments likely underrepresented]
- Key results: [paste headline results or table]
- Decision this survey will inform: [product, marketing, policy, pricing, etc.]
- Available benchmark data: [CRM, census, customer base, prior surveys]

Provide:
1. Sampling frame assessment
2. Nonresponse and self-selection bias risks
3. Representativeness check against known population benchmarks
4. Recommended weighting or segmentation approach, if appropriate
5. Questions/results that are safe vs risky to generalize
6. Reporting caveats written in plain English
7. Follow-up data collection plan to fill gaps
8. Executive summary explaining confidence level and decision risk

Be precise about what the data can and cannot support.