1. Is there a difference in satisfaction level between those that
left and those that stayed in the company?
##
## Welch Two Sample t-test
##
## data: hr$satisfaction_level by hr$employee_status
## t = -46.636, df = 5167, p-value < 2.2e-16
## alternative hypothesis: true difference in means between group left and group Stayed is not equal to 0
## 95 percent confidence interval:
## -0.2362417 -0.2171815
## sample estimates:
## mean in group left mean in group Stayed
## 0.4400980 0.6668096
The people that stayed on average, tend to have higher satisfaction
levels
2. Is there a difference in average monthly hours between those that
left and those that stayed in the company?
##
## Welch Two Sample t-test
##
## data: hr$average_montly_hours by hr$employee_status
## t = 7.5323, df = 4875.1, p-value = 5.907e-14
## alternative hypothesis: true difference in means between group left and group Stayed is not equal to 0
## 95 percent confidence interval:
## 6.183384 10.534631
## sample estimates:
## mean in group left mean in group Stayed
## 207.4192 199.0602
People that left on average, worked more hours
3. Is there a difference in last evaluation between those that left
and those that stayed in the company?
##
## Welch Two Sample t-test
##
## data: hr$last_evaluation by hr$employee_status
## t = 0.72534, df = 5154.9, p-value = 0.4683
## alternative hypothesis: true difference in means between group left and group Stayed is not equal to 0
## 95 percent confidence interval:
## -0.004493874 0.009772224
## sample estimates:
## mean in group left mean in group Stayed
## 0.7181126 0.7154734
There is no difference in employees’ last evaluation between
employees that stayed vs employees that left