2019 US Spa Industry Study 2019 US Spa Industry Study | Page 62

Survey Outcomes
The survey was launched on a bespoke Internet registration site in January 2019 and ran until
April 2019.
Results represent responses from 2,201 establishments. Those establishments were based on
593 survey returns that were submitted for either single locations or composite returns for multiple
spa locations.
When compared to their share of all spa establishments, resort/hotel spas were over-represented
in the sample while day spas were under-represented. The findings reported in this study have,
therefore, been weighted to reflect the distribution of establishments by type of spa.
As the information for this study was collected from a sample of spas, the findings will inevitably
be subject to margins of error. For proportions based on all respondents, the indicative margins of
error at the 95% confidence level are ±4.0%.
The margins of error are wider for sub-samples. Thus, for proportions based on all day spas, the
margins of error are ±5.4%. For proportions relating to resorts/hotels, the indicative margins of
error are ±6.9%.
Key ratios by spa type and region should be interpreted with caution. They are estimates based
on a sample of spa establishments and are therefore subject to variability from sampling error.
Special care should be taken in making comparisons with previous Spa Industry reports as
estimates in those reports will also exhibit sampling error variability.
Introduction
Industry Size:
Performing Strongly
Spa Services
and Facilities
Spa Industry
Profile
Technical Appendix
Page 61