nilai = read.delim(file.choose(), header = TRUE)
nilai
##    Data
## 1    40
## 2    50
## 3    50
## 4    60
## 5    60
## 6    60
## 7    70
## 8    70
## 9    70
## 10   70
## 11   80
## 12   80
## 13   80
## 14   90
## 15   90
## 16  100
x = nilai$Data
summary(x)
##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##      40      60      70      70      80     100
library(nortest)
lillie.test(x)
## 
##  Lilliefors (Kolmogorov-Smirnov) normality test
## 
## data:  x
## D = 0.125, p-value = 0.7235