1. Satisfaction Level vs Last Evaluation

The 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

We reject the null hypothesis (Ho) because the p-value is < .01
The correlation is positive and weak

Non-Technical Interpretation

An increase in the last evaluation will increase satisfaction slightly

Plot

2. Satisfaction Level vs Average Monthly Hours

The 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

We fail to reject the null hypothesis (Ho) because the p-value is > .01
The correlation is negative and weak

Non-Technical Interpretation

An increase in the average monthly hours will decrease satisfaction slightly

Plot

3. Last Evaluation vs Average Monthly Hours

The correlation

## 
##  Pearson's product-moment correlation
## 
## data:  hr$last_evaluation and hr$average_montly_hours
## t = 44.237, df = 14997, p-value < 2.2e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.3255078 0.3538218
## sample estimates:
##       cor 
## 0.3397418

Technical Interpretation

We reject the null hypothesis (Ho) because the p-value is < .01
The correlation is positive and weak

Non-Technical Interpretation

An increase in the average monthly hours will increase the last evaluation slightly

Plot

4. Time Spent at Company vs Satisfaction Level

The correlation

## 
##  Pearson's product-moment correlation
## 
## data:  hr$time_spend_company and hr$satisfaction_level
## 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

We reject the null hypothesis (Ho) because the p-value is < .01
The correlation is negative and weak

Non-Technical Interpretation

An increase in the time spent at the company will decrease the satisfaction level slightly

Plot