Filtering and Validating Data for Shapiro's Test in R

Calculating the Absolute Difference Between Two Columns in a DataFrame with Numerical and NA Values

Filling Missing Values with Repeated Values in R Using dplyr and tidyr

Replacing Missing Values in Specific Columns for Each Group in R Using data.table Package

Replacing Missing Values in Multiple Columns with NA Using dplyr Package in R

Handling Missing Values in Paired T-Test: Solutions for Accurate Results