An article in Air and Waste ["Update on Ozone Trends in California's South Coast Air Basin" (Vol. 43, 1993)] studied the ozone levels on the South Coast air basin of California for the years...

7. Answer the problems completely.
Round off your answers up to four decimal places, with correct units and box or encircle them.

Extracted text: An article in Air and Waste ["Update on Ozone Trends in California's South Coast Air Basin" (Vol. 43, 1993)] studied the ozone levels on the South Coast air basin of California for the years 1976–1991. The author believes that the number of days that the ozone level exceeds 0.20 parts per million depends on the seasonal meteorological index (the seasonal average 850 millibar temperature). The data follow: Year Days Index Year Days Index 1976 91 16.7 1984 81 18.0 1977 105 17.1 1985 65 17.2 1978 106 18.2 1986 61 16.9 1979 108 18.1 1987 48 17.1 1980 88 17.2 1988 61 18.2 1981 91 18.2 1989 43 17.3 1982 58 16.0 1990 33 17.5 1983 82 17.2 1991 36 16.6 wuwivyuui ILTelallng number What ohange in the ...laa afda- What obor in the indav is -- .0 uays: :nifinenaa af tha intara- .VILII u 7. Test for significance of regression using a=0.05. What conclusions can you draw?