Use the sign test to test whether the median air quality index during December-January was significantly higher in 2019-20, compared with 2018-19, using ? = 10%. without use the binom.test or sign.test automated functions in R. state the p-value and conclusion.

The 'Black Summer' Australian bushfires in 2019-2020 burned over 24 million hectares of land, directly caused 33 deaths and blanketed parts of Australia in smoke for weeks. The table below gives a sample of AQI (air quality index) readings for Canberra city centre during December and January, 2018-2019 and 2019-2020, measured at the same date and time across the two years. The higher the reading, the more particles are in the air, with an AQI over 300 rated as 'hazardous' to human health. Date and time 18-19 19-20 2/12 1:00 20 89 11/12 6:00 24 170 26/12 18:00 42 286 29/12 9:00 58 320 6/1 4:00 62 2333 9/1 1:00 34 414 16/1 6:00 67 77 22/1 0:00 33 22/1 3:00 35 23 24/1 13:00 45 192 Source: data.act.gov.au/Environment/Air-Quality-Monitoring-Data/9485-zqnn Note: air quality is a random variable that can change at different times of the day and year, depending on the weather and pollution levels