Differentiate between:

(a) Quantitative Research and Qualitative Research.
(b) In-sample forecast and out-of-sample forecast.
(c) Autoregressive Model and Autoregressive Distributed Lag Model.

(a)

Quantitative research is a systematic investigation of phenomena by gathering quantifiable data and performing statistical, mathematical, or computational techniques. Quantitative research collects information from existing and potential customers using sampling methods and sending out online surveys, online polls, and questionnaires, for example.

The results of which can be depicted in the form of numerical. After careful understanding of these numbers to predict the future of a product or service and make changes accordingly.

An example of quantitative research is the survey conducted to understand the amount of time a doctor takes to tend to a patient when the patient walks into the hospital. A patient satisfaction survey template can be administered to ask questions like how much time a doctor takes to see a patient, how often a ________ ____ ______ ____ _________ ____ ___ _________ ________ ______ ________.
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