Develop a discussion related to the four below week's objectives. 

You can choose any (ONLY ONE) and make a brief discussion:

1. Explain the relationship between variables and levels of measurement
2. Distinguish between categorical and continuous variables
3. Categorize variables according to the appropriate level of measurement
4. Differentiate between the reliability and validity of a measure
5. Evaluate the reliability and validity of a measure.  

Please include 400 words in your initial post and two or more scholarly references by Wednesday, APA style, less than 20 % plagiarism, No AI