What are different sources of secondary data information?

There are different sources of secondary data information

Internal Source

External Source

These sources of data are sub divided into further parts;

Internal Sources

Balance sheets

Inventory record

Loss and profit statements [4]

External Source

Professional, trade and business association

Government sources

Corporate fillings

Q4) Describe the different types of measurement scales. 
There are four types of measurement scales which is explained as below;

Ordinal Scale

Nominal Scale

Interval Scale

Ratio Scale [5]

References of secondary data information? 

Grimsley, S. (2018). Secondary Data in Marketing Research: Definition, Sources & Collection. Retrieved from https://study.com/academy/lesson/secondary-data-in-marketing-research-definition-sources-collection.html

Mymarketresearchmethods.com. (2017). YPES OF DATA & MEASUREMENT SCALES: NOMINAL, ORDINAL, INTERVAL AND RATIO. Retrieved from https://www.mymarketresearchmethods.com/types-of-data-nominal-ordinal-interval-ratio/