A Shiny application that predicts Miles Per Gallon (MPG) based on horsepower and transmission type.

MPG is an important indicator of fuel efficiency

Many users find car specifications confusing

This app provides a simple, interactive way to understand MPG.

We use the built-in mtcars dataset available in R.

##                    mpg cyl disp  hp drat    wt  qsec vs am gear carb
## Mazda RX4         21.0   6  160 110 3.90 2.620 16.46  0  1    4    4
## Mazda RX4 Wag     21.0   6  160 110 3.90 2.875 17.02  0  1    4    4
## Datsun 710        22.8   4  108  93 3.85 2.320 18.61  1  1    4    1
## Hornet 4 Drive    21.4   6  258 110 3.08 3.215 19.44  1  0    3    1
## Hornet Sportabout 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
## Valiant           18.1   6  225 105 2.76 3.460 20.22  1  0    3    1

A simple linear regression model is used to predict MPG.

## 
## Call:
## lm(formula = mpg ~ hp + am, data = mtcars)
## 
## Residuals:
##     Min      1Q  Median      3Q     Max 
## -4.3843 -2.2642  0.1366  1.6968  5.8657 
## 
## Coefficients:
##              Estimate Std. Error t value Pr(>|t|)    
## (Intercept) 26.584914   1.425094  18.655  < 2e-16 ***
## hp          -0.058888   0.007857  -7.495 2.92e-08 ***
## am           5.277085   1.079541   4.888 3.46e-05 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 2.909 on 29 degrees of freedom
## Multiple R-squared:  0.782,  Adjusted R-squared:  0.767 
## F-statistic: 52.02 on 2 and 29 DF,  p-value: 2.55e-10

Easy to use and interactive

No prior statistical knowledge required

Can be extended with more predictors

Try the Shiny app for live MPG predictions!