Respondents in five states were asked about their willingness to pay to protect national parks or NPS-managed wilderness areas within a particular region.
Respondents in 30 different states were asked their opinion on going to the moon. 
mnli hypothesis: Respondents in 30 different states were asked their opinion on going to the moon.  premise: Respondents in five states were asked about their willingness to pay to protect national parks or NPS-managed wilderness areas within a particular region.