Rstudio4

library(readr)
file_direct<- "/Users/limjiyun/Desktop/F1/ozone.csv"
dat<-read_csv(file_direct)

## Rows: 111 Columns: 4
## ── Column specification ────────────────────────────────────────────────────────
## Delimiter: ","
## dbl (4): rad, temp, wind, ozone
## 
## ℹ Use `spec()` to retrieve the full column specification for this data.
## ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.

pairs(dat)

mod <- lm(ozone ~ rad +wind +temp, data = dat)
summary(mod)

## 
## Call:
## lm(formula = ozone ~ rad + wind + temp, data = dat)
## 
## Residuals:
##     Min      1Q  Median      3Q     Max 
## -40.485 -14.210  -3.556  10.124  95.600 
## 
## Coefficients:
##              Estimate Std. Error t value Pr(>|t|)    
## (Intercept) -64.23208   23.04204  -2.788  0.00628 ** 
## rad           0.05980    0.02318   2.580  0.01124 *  
## wind         -3.33760    0.65384  -5.105 1.45e-06 ***
## temp          1.65121    0.25341   6.516 2.43e-09 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 21.17 on 107 degrees of freedom
## Multiple R-squared:  0.6062, Adjusted R-squared:  0.5952 
## F-statistic: 54.91 on 3 and 107 DF,  p-value: < 2.2e-16

car :: vif(mod)

##      rad     wind     temp 
## 1.095241 1.328979 1.431201

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