Table 3.

PM_2.5 and PM₁₀ mass concentrations (μg/m³) for the curfew and non curfew during the lockdown (22 March–10 May 2020): Before and after removing ‘dust effect’.

	Dust Effect	Period	Mean	Median	Minimum	Maximum	SD	Wilcoxon*
PM2.5	Before	Curfew	30.2	26.6	8.6	93.7	14.7	z = 0.825, sig. = 0.409
		Non curfew	38.4	27.3	9.5	404.1	57.1
	After	Curfew	27.2	25.8	8.6	58.7	10.6	z = 0.666, sig. = 0.431
		Non curfew	26.8	23.0	9.5	47.5	10.8
PM10	Before	Curfew	109.9	90.1	44.7	447.3	81.4	z = 2.302, sig. = 0.021**
		Non curfew	149.2	95.5	41.4	1278.0	209.4
	After	Curfew	83.3	70.9	44.7	150.3	32.4	z = 0.624, sig. = 0.490
		Non curfew	82.5	73.6	41.4	155.8	30.7

* Wilcoxon matched-pairs signed-ranks test; ** p -value ≤0.05.