I have to find which formula to use to calculate if there is an outlier in this piece of data. They are cranial measurements (Cranial length, Cranial height, Cranial Breadth and Facial Projection Length) which consist of whole numbers like (170mm,180mm,173mm) etc. I am not sure if this is an example of discrete data or continuous. I know discrete is like 24 students and continuous is like 6.5, 6.6 etc. but i know that continuous is a measurement of something which is confusing me because mm is a measurement but all the numbers are whole numbers. Can someone please help me?