Table 1.

Friedman’s test.

Treatment	Blocks	Environment	Direction	Distance	p-Value	Null Hypothesis
Nose in/out	All masks	Not ventilated	Front	30 cm	$3.5\times {10}^{-33}$	Rejected
Nose in/out	All masks	Not ventilated	Above	30 cm	$4.3\times {10}^{-13}$	Rejected
Nose in/out	All masks	Not ventilated	Left	30 cm	$1.2\times {10}^{-10}$	Rejected
Nose in/out	All masks	Not ventilated	Right	30 cm	1	Not rejected
Nose in/out	All masks	Not ventilated	Front	60 cm	$1.7\times {10}^{-22}$	Rejected
Nose in/out	All masks	Not ventilated	Above	60 cm	$8.2\times {10}^{-05}$	Rejected
Nose in/out	All masks	Not ventilated	Left	60 cm	$0.117$	Not rejected
Nose in/out	All masks	Not ventilated	Right	60 cm	$0.0547$	Not rejected
Nose in/out	All masks	Not ventilated	Front	90 cm	$1.2\times {10}^{-15}$	Rejected
Nose in/out	All masks	Not ventilated	Above	90 cm	$0.0005$	Rejected
Nose in/out	All masks	Not ventilated	Left	90 cm	1	Not rejected
Nose in/out	All masks	Not ventilated	Right	90 cm	1	Not Rejected
Nose in/out	All masks	Ventilated	Front	30 cm	$3\times {10}^{-37}$	Rejected
Nose in/out	All masks	Ventilated	Above	30 cm	$1\times {10}^{-05}$	Rejected
Nose in/out	All masks	Ventilated	Left	30 cm	$0.0575$	Not rejected
Nose in/out	All masks	Ventilated	Right	30 cm	$9.7\times {10}^{-11}$	Rejected
Nose in/out	All masks	Ventilated	Front	60 cm	$8.3\times {10}^{-21}$	Rejected
Nose in/out	All masks	Ventilated	Above	60 cm	$3.2\times {10}^{-15}$	Rejected
Nose in/out	All masks	Ventilated	Left	60 cm	$5.6\times {10}^{-6}$	Rejected
Nose in/out	All masks	Ventilated	Right	60 cm	$7.6\times {10}^{-19}$	Rejected
Nose in/out	All masks	Ventilated	Front	90 cm	$1.9\times {10}^{-12}$	Rejected
Nose in/out	All masks	Ventilated	Above	90 cm	$7.4\times {10}^{-5}$	Rejected
Nose in/out	All masks	Ventilated	Left	90 cm	$1.7\times {10}^{-10}$	Rejected
Nose in/out	All masks	Ventilated	Right	90 cm	$4.4\times {10}^{-11}$	Rejected