What's the difference between Categorical Data and Numerical Data:
Categorical has questions or answers that can be described by characteristics or genres examples include: colors, music type, clothing, movie type etc.
Numerical has questions or answers that can be described using numbers or sets of numbers examples include: temperature, height, grades etc.
You can actually have SOME that can be classified as BOTH. Think about a deck of cards:
categorical: grouping together by card color
numerical: grouping together by even numbers
This is PART ONE of 6th grade data analysis