**5. Conclusions**

The comparison of the empirical probabilities of coverage of the expected value by the examined six bootstrap confidence intervals used for estimation of the mean droplet stain diameter following the spraying process performed with the Lechler 110-03 sprayer nozzle leads to the following conclusions:


**Author Contributions:** Conceptualization, A.B. and I.K-.B.; methodology, A.B. and I.K-.B.; software, A.B..; validation, A.B., P.A.K., I.K-.B. and M.K.; formal analysis, P.A.K. and I.K-.B.; investigation, M.K..; resources, M.K..; data curation, P.A.K. and M.K.; writing—original draft preparation, A.B., P.A.K., I.K-.B. and M.K; writing—review and editing, A.B., P.A.K., I.K-.B. and M.K; visualization, A.B. and P.A.K.; supervision, A.B. and I.K-.B.; project administration, A.B. and I.K-.B.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
