x<-c(5,8,9,10,7,2,1,15)
min(x)#the lowest value
## [1] 1
max(x)#the highest value.
## [1] 15
sum(x)#the sum of the values
## [1] 57
mean(x)#the average 
## [1] 7.125
median(x)#the median 
## [1] 7.5
var(x)#the variance 
## [1] 20.41071
sd(x)#the standard deviation
## [1] 4.517822