Understanding your data

Before starting with the actual analysis, it's important to understand the structure of your data. Both test and train are data frames, R's way of representing a dataset. You can easily explore a data frame using the str() function. str() gives you information such as the data types in the data frame (e.g. int for integer), the number of observations, and the number of variables.

The training and test set that you've imported before are already available in the workspace, as train and test. Which of the following statements is correct?

Possible answers

The training set has 891 observations and 12 variables.

The training set has 418 observations and 11 variables.

The testing set has 891 observations and 11 variables.

The testing set has 418 observations and 12 variables.

Exercise

Understanding your data

Instructions

Possible answers