5 ms·

1000 gets you down to 3% margin of sampling error. Asking the question in different ways can affect the results a lot more.

• wil421 8y ago
  Not very knowledgeable of margin of errors but does 1,000 people, not women, really give you enough data to represent 30+ million females between 15-30?
  • tlb 8y ago
    Out of 1000 adults, you'd expect 125 to be women 15-30. That gives a margin of error for that subgroup of 9% (at 95% confidence level). They quoted 40%, so it's 95% likely to be between 31% and 49%. The size of the population doesn't affect the accuracy of a survey, only the size of the survey.
    • wil421 8y ago
      You answered my first question and now I have many many more. Thanks for responding.