Specific statistics for one or more variables

As you saw before, you can use functions like summary(), psych::describe() or Hmisc::describe() to get many descriptive statistics at once for one or more variables in a dataset. You've also computed individual statistics in earlier exercises using functions like mean(), median(), sd() and others.

However, the dplyr package provides the summarise() and summarise_all() functions which allow you to compute multiple custom specific statistics of interest together for one or more variables at a time.

The abaloneKeep dataset and dplyr package are already loaded for you.

Get summary statistics for shucked weight and whole weight from the abaloneKeep dataset using summary().
Get mean and standard deviation of length using the summarise() function from the dplyr package. Name the output statistics mean_length and sd_length for mean and standard deviation respectively.
Get mean and standard deviation of height and diameter using the summarise_all() function from the dplyr package.

Take Hint (-30 XP)

Exercise

Specific statistics for one or more variables

Instructions