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Table 3 Statistical summary of physical indoor air quality parameters in public primary schools of Gondar city, Northwest Ethiopia, 2018 (n = 51)

From: Indoor bacterial load and its correlation to physical indoor air quality parameters in public primary schools

Variables Mean Standard Deviation Median Minimum Maximum
CO2 6:30 am 458.54 30.44 453 406 550
CO2 5:00 pm 429.12 27.05 422 401 548
T °C 6:30 am 14.27 0.94 14 12 16
T °C 5:00 pm 19.02 3.08 20 15 24
RH%6:30 am 39.37 14.25 45 21 61
RH%5:00 pm 36.37 13.89 39 14 57
PM2.5 6:30 am 68.18 43.42 48 18 173
PM2.5 5:00 pm 12.82 3.38 13 7 22
PM10 6:30 am 138.06 68.64 129 42 277
PM10 5:00 pm 55.92 22.06 51 21 144
  1. N.B Carbon dioxide, (CO2, ppm); Temperature, (T, °C); Relative humidity, RH (%); concentration of particulate matter concentration PM10 and PM2.5 (μg/m3)