Descriptive statistics
This exercise will cover how to get simple descriptive statistics for individual variables from the abalone dataset and for multiple variables at once. You will use the functions pull(), mean() and median() for single variables and select() and summary() to get summary statistics on multiple variables at once.
The abalone dataset and dplyr package are already loaded for you.
This exercise is part of the course
R For SAS Users
Exercise instructions
- Find the mean length of the abalones using both the
pull()andmean()functions. - Find the median whole weight of the abalones using both the
pull()andmedian()functions. - Get summary statistics of diameter and shell weight using the
select()andsummary()functions.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Find mean length of abalones using pull() and mean()
abalone %>%
pull(___) %>%
mean()
# Find the median wholeWeight of the abalones
___ %>%
___ %>%
___
# Get descriptive statistics of diameter and shellWeight
___ %>%
select(___, ___) %>%
___