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 is < alpha (0.001) therefore we reject the Ho and say there is a positive and small correlation between last evaluation and satisfaction level

Non-Technical Interpretation:

As evaluations increase, satisfaction increases slightly

2. Correlation: Number of Projects with Average Monthly Hours

## 
##  Pearson's product-moment correlation
## 
## data:  hr$number_project and hr$average_montly_hours
## t = 56.219, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.4039037 0.4303411
## sample estimates:
##       cor 
## 0.4172106

Technical interpretation:

The p-value is < alpha (0.001) therefore we reject the Ho and say there is a positive and moderate correlation between the number of projects and average monthly hours.

Non-Technical Interpretation:

Employees with more projects, tend to work more hours.

3. Correlation: Time at Company with Number of Projects

## 
##  Pearson's product-moment correlation
## 
## data:  hr$time_spend_company and hr$number_project
## t = 24.579, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.1813532 0.2121217
## sample estimates:
##       cor 
## 0.1967859

Technical interpretation:

The p-value is < alpha (0.001) therefore we reject the Ho and say there is a positive and small correlation between time spent at the company and number of projects.

Non-Technical Interpretation:

Employees who have been at the company longer tend to work on more projects

4. Correlation: Satisfaction Level with Average Monthly Hours

## 
##  Pearson's product-moment correlation
## 
## data:  hr$satisfaction_level and hr$average_montly_hours
## t = -2.4556, df = 14997, p-value = 0.01408
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  -0.036040356 -0.004045605
## sample estimates:
##         cor 
## -0.02004811

Technical interpretation:

The p-value is < alpha (0.001) therefore we reject the Ho and say there is a negative and very small correlation between satisfaction level and average monthly hours.

Non-Technical Interpretation:

Employees who work more hours tend to be slightly less satisfied