1. Satisfaction Level vs Last Evaluation

Correlation

## 
##  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 less than alpha (0.01) therefore we reject the Ho and conclude that there is a positive correlation between satisfaction level and last evaluation

Non-Technical Interpretation

As last evaluation increases, satisfaction level increases slightly

Graph

2. Satisfaction Level vs Average Monthly Hours

Correlation

## 
##  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 greater than alpha (0.01) therefore we retain the Ho and conclude that there is no correlation between satisfaction level and average monthly hoursn

Non-Technical Interpretation

The amount of hours has no effect on employee satisfaction

Graph

3. Satisfaction Level vs Time Spent at Company

Correlation

## 
##  Pearson's product-moment correlation
## 
## data:  hr$satisfaction_level and hr$time_spend_company
## t = -12.416, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  -0.11668153 -0.08499948
## sample estimates:
##        cor 
## -0.1008661

Technical Interpretation

The p-value is less than alpha (0.01) therefore we reject the Ho and conclude that there is a negative correlation between satisfaction level and time spent at the company

Non-Technical Interpretation

As time spent at the company increases, satisfaction level decreases slightly

Graph

4. Average Monthly Hours vs Time Spent at Company

Correlation

## 
##  Pearson's product-moment correlation
## 
## data:  hr$average_montly_hours and hr$time_spend_company
## t = 15.774, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.1119801 0.1434654
## sample estimates:
##       cor 
## 0.1277549

Technical Interpretation

The p-value is less than alpha (0.01) therefore we reject the Ho and conclude that there is a positive correlation between average monthly hours and time spent at the company

Non-Technical Interpretation

As time spent at the company increases, average monthly hours increases slightly

Graph