CoffeData

El conjunto de datos “coffeData.csv” contiene 1337 marcas de café y 13 variables, las cuales describen la calidad del café con base en variables sensoriales.

Estadísticas Descriptivas

       X           Species                  Country.of.Origin Fragrance...Aroma
 Min.   :   1   Arabica:1309   Mexico                :237     Min.   :5.080    
 1st Qu.: 335   Robusta:  28   Colombia              :183     1st Qu.:7.420    
 Median : 669                  Guatemala             :180     Median :7.580    
 Mean   : 669                  Brazil                :132     Mean   :7.572    
 3rd Qu.:1003                  Taiwan                : 75     3rd Qu.:7.750    
 Max.   :1337                  United States (Hawaii): 73     Max.   :8.750    
                               (Other)               :457                      
     Flavor        Aftertaste     Salt...Acid      Mouthfeel    
 Min.   :6.080   Min.   :6.170   Min.   :5.250   Min.   :5.080  
 1st Qu.:7.330   1st Qu.:7.250   1st Qu.:7.330   1st Qu.:7.330  
 Median :7.580   Median :7.420   Median :7.580   Median :7.500  
 Mean   :7.527   Mean   :7.407   Mean   :7.541   Mean   :7.524  
 3rd Qu.:7.750   3rd Qu.:7.580   3rd Qu.:7.750   3rd Qu.:7.750  
 Max.   :8.830   Max.   :8.670   Max.   :8.750   Max.   :8.750  
                                                                
    Balance       Bitter...Sweet   Uniform.Cup       Clean.Cup     
 Min.   : 5.250   Min.   :5.250   Min.   : 6.000   Min.   : 0.000  
 1st Qu.:10.000   1st Qu.:7.330   1st Qu.:10.000   1st Qu.:10.000  
 Median :10.000   Median :7.500   Median :10.000   Median :10.000  
 Mean   : 9.868   Mean   :7.527   Mean   : 9.844   Mean   : 9.849  
 3rd Qu.:10.000   3rd Qu.:7.670   3rd Qu.:10.000   3rd Qu.:10.000  
 Max.   :10.000   Max.   :8.580   Max.   :10.000   Max.   :10.000  
                                                                   
 Cupper.Points   quality_score  
 Min.   : 5.17   Min.   :63.08  
 1st Qu.: 7.25   1st Qu.:81.17  
 Median : 7.50   Median :82.50  
 Mean   : 7.51   Mean   :82.17  
 3rd Qu.: 7.75   3rd Qu.:83.67  
 Max.   :10.00   Max.   :90.58  
                                

Portada

arbol

Sabor del Café.

Calidad del Café.

Caja para la variable Sabor.

Caja para la variable calidad del café.

Relación entre el sabor y calidad del café.

Interpretación.

Se observa una relación directamente proporcional entre el sabor del café y su calidad global.

regresion lineal simple

Call:
lm(formula = quality_score ~ Flavor, data = datos)

Residuals:
     Min       1Q   Median       3Q      Max 
-13.0161  -0.3739   0.1998   0.7402   5.4407 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)    
(Intercept)  33.8941     0.8721   38.86   <2e-16 ***
Flavor        6.4137     0.1158   55.41   <2e-16 ***
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 1.442 on 1335 degrees of freedom
Multiple R-squared:  0.6969,    Adjusted R-squared:  0.6967 
F-statistic:  3070 on 1 and 1335 DF,  p-value: < 2.2e-16