Identify and explain the four levels of measurement, giving an example of each one. LEVELS OF MEASUREMENT-NOMINAL, ORDINAL, INTERVAL AND RATIO

There are 4 questions:
1. Identify and explain the four levels of measurement, giving an example of each one. LEVELS OF MEASUREMENT-NOMINAL, ORDINAL, INTERVAL AND RATIO.
After each statement, please add citations.
Thank you
200 words

2. Explain what is meant by Measures of Central Tendency and Measures of Dispersion. Please give an example and add citations. Thank you.
200 words

3. What is the difference between Descriptive Statistics and Inferential Statistics
Example: Difference Between Descriptive and Inferential Statistics (with Comparison Chart)-KEY DIFFERENCES. Please, add citations in, at least 3. Thank you
250 words

4. Independent and dependent variable. Example: Independent Variables vs Dependent Variables: Key Differences
Please, add citations, at least 3.
200 words