Call:

lm(formula = AQI ~ PM2.5 + PM10 + SO₂ + CO + NO₂ + O₃, data = air)

Residuals:

Min 1Q Median 3Q Max

−11.9898 −3.9216−0.26693.6843 18.2069

Coefficients:

Estimate Std. Error t value Pr(>|t|)

(Intercept) −13.52998 10.94688 −1.236 0.2245

PM2.5 0.86999 0.0843110.319 2.67e−12 ***

PM10 0.22467 0.07914 2.839 0.0074 **

SO₂ 0.10969 0.12524 0.876 0.3869

CO 1.84763 5.41873 0.341 0.7351

NO₂ 0.01416 0.14484 0.098 0.9227

O₃ 0.33644 0.04969 6.770 6.59e−08 ***

---

Signif. codes:0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 7.118 on 36 degrees of freedom

Multiple R-squared:0.9744, Adjusted R-squared:0.9701

F-statistic: 228.1 on 6 and 36 DF,p-value: < 2.2e−16