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Exercise

Descriptive statistics output

Up to now, you've only printed your output to the console. In this exercise, you will save your output from both the summary() and psych::describe() functions for descriptive statistics of the abalone weight measurements.

First, you will save output from the summary() function, which is a table class object. Elements from table objects can be selected using the [row, col] syntax.

Next you will save the output from the psych::describe() function. This output is a customized class type called psych describe, which is also a data.frame class. So, elements of psych::describe() output can be extracted using the $ operator to select elements by name from this output.

The abaloneKeep dataset, dplyr and psych packages have been loaded for you.

Instructions

100 XP
  • Save summary stats for whole weight, shucked weight and shell weight in abaloneKeep as absummary.
  • Display columns 1 to 2 out of absummary.
  • Get descriptive statistics of abalone whole weight, shucked weight, and shell weight in abaloneKeep using psych::describe() and save output as abpsych.
  • Display the mean absolute deviation mad from abpsych.