1. Correlation between MPG and HP
##
## Pearson's product-moment correlation
##
## data: mtcars$mpg and mtcars$hp
## t = -6.7424, df = 30, p-value = 1.788e-07
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
## -0.8852686 -0.5860994
## sample estimates:
## cor
## -0.7761684
Technical interpretation
- The test result is significant alpha (0.05) is > than
P-value.
- There is a correlation between hp and mpg, we reject the null
hypothesis because the key value is less than alpha.
- The correlation is negative, and big.
Non-technical interpretation
- The higher the Horsepower the lower the fuel efficiency.