1. Correlation satisfaction level with last evaluation

## 
##  Pearson's product-moment correlation
## 
## data:  hr$satisfaction_level and hr$last_evaluation
## t = 12.933, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.08916727 0.12082195
## sample estimates:
##       cor 
## 0.1050212

Technical interpretation:

The p-value < than alpha (0.001) therefore we reject the Ho and say there is a positive and smallcorrelation between last evaluation and satisfaction level

Non-Technical interpretation:

As evaluations increase, satisfaction increases slightly