1. Why is validating the data for completeness and integrity an important component of obtaining the data?
2. Are economic indicators, such as unemployment and GDP, considered as internal or external data types? How can these economic indicators help predict sales in the next quarter and the next year?
3. Why is net income or net sales better defined as ratio data instead of interval data?
4. Why is temperature measured using a Fahrenheit scale not considered to be ratio data?