I have a dataset that contains historical prices of a stock and number of mentions of the stock in the news. I want to know what is the best statistical way of deducting the relation (if any) between the two variables. And how to formulate this relation?
The prices are in $ and the number of mentions go like 1,2,3,4, both over time.
I thought about probability, regression analysis and hypothesis testing. Are there other better ways?