LEED AP with Operations and Maintenance (O+M ) Practice Exam

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If the survey response rate is 50% under LT Credit 1 - Alternative Transportation, what is the extrapolation factor?

  1. 0.6

  2. 0.7

  3. 0.8

  4. 0.9

The correct answer is: 0.8

In the context of LEED certification, particularly under LT Credit 1 - Alternative Transportation, the survey response rate helps determine the extent to which a building’s users, such as occupants and visitors, utilize alternative transportation options. The extrapolation factor is a multiplier used to adjust the actual survey results to estimate the full population's behavior. When a survey response rate is 50%, it suggests that only half of the intended participants provided feedback. The extrapolation factor is calculated based on this response rate. In LEED, a 50% response rate typically corresponds to an extrapolation factor of 0.8. This means that the actual behavior of the respondents is assumed to reflect the behavior of the entire population with a reasonable level of accuracy. Having a solid extrapolation factor like 0.8 allows project teams to derive meaningful conclusions about the transportation habits of the broader population, even if they only received feedback from half of it. This factor ensures that the analysis remains conservative yet practical in interpreting the significance of alternative transportation usage in the context of achieving LEED credits.