Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Imputation of Missing Values. NaN refers to a missing value. Mean is a statistical measure used for imputing missing numerical values by replacing them with the mean value of the available data. Mode is a statistical measure used for imputing missing categorical values by replacing them with the mode (most frequently occurring value) of the available data.
