TASK 4b

Use R to create a table showing the average age of the survivors and the average age of the people who died

titanic.df<-read.csv(paste("Titanic Data.csv", sep=""))
attach(titanic.df)
survivors_age<-aggregate(Age~Survived, list(Survived), mean)
survivors_age
##   Survived      Age
## 1        0 30.41530
## 2        1 28.42382

TASK 4c

Use R to run a t-test to test the following hypothesis: H2: The Titanic survivors were younger than the passengers who died.

t.test(Age~Survived)
## 
##  Welch Two Sample t-test
## 
## data:  Age by Survived
## t = 2.1816, df = 667.56, p-value = 0.02949
## alternative hypothesis: true difference in means is not equal to 0
## 95 percent confidence interval:
##  0.1990628 3.7838912
## sample estimates:
## mean in group 0 mean in group 1 
##        30.41530        28.42382

since the p value is less than 0.05, thus the null hypothesis that Age and Survival is independent (average age of survivors and average age of dead are not equal)- is rejected. thus H2 is true.