Assignment 8: T- test

Do years married affect cheating?

## 
##  Welch Two Sample t-test
## 
## data:  affairs$yearsmarried by affairs$cheater
## t = -3.6123, df = 274.53, p-value = 0.0003608
## alternative hypothesis: true difference in means between group No and group Yes is not equal to 0
## 95 percent confidence interval:
##  -2.7881721 -0.8211625
## sample estimates:
##  mean in group No mean in group Yes 
##          7.727279          9.531947

Years married has an effect on cheating

• The p-value < alpha (0.01), therefore
• We reject the Ho, and and conclue there is a difference in years married between cheaters and non-cheaters
• People that cheat, on avaerage, have been married longer