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.
Deze oefening maakt deel uit van de cursus
R For SAS Users
Oefeninstructies
- 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.
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
# 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(___, ___) %>%
___