Biostatistics
Explore The University of North Carolina's web page and interact with Lesson 1 and 2. Begin by reviewing Lesson 1's measurement scale definitions to understand data types, then read Lesson 2 (Descriptive Statistics) in full, paying special attention to the three basic descriptive characteristics section, the "OK to Compute" table, and all three examples; other lessons are optional. (26 minutes)
Click https://wp.media.unc.edu/biostatistics/lesson-1-data-characteristics/ link to open resource.