# açıklama
library (dplyr)
##
## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
##
## filter, lag
## The following objects are masked from 'package:base':
##
## intersect, setdiff, setequal, union
library (MASS)
##
## Attaching package: 'MASS'
## The following object is masked from 'package:dplyr':
##
## select
data("survey")