Machine Learning - Regression

Regression

Let's understand what is Regression in Machine Learning?

A case for regression

The Advertising data displays sales for a particular product as a function of advertising budgets for TV, radio and newspaper media. In our role as statistical consultants, we are asked to suggest, on the basis of this data, a marketing plan for next year that will result in high product sales.

here are a few important questions that we might seek to address:

1. Is there a relationship between the advertising budget and sales?
2. How strong is the relationship between the advertising budget and sales?
3. which media contribute to sales?
4. How accurately can we estimate the effects of each medium on sales?
5. Is the relationship linear?

If there is approximately a straight-line relationship between advertising expenditure in the various media and sales, then linear regression is an appropriate tool. if not then it may still be possible to transform the predictor or the response So that linear regression can be used.