In most statistics or data analysis books (at least the ones I have), there is always an explanation that states that correlation is not necessarily causation. The misunderstanding or intentional fallacy of the correlation between variables can affect the bottom line of a business.
When we are trying to get insights from the data, one of the first steps to take is summarizing this collection of raw numbers into one number that represents the majority. The way to do this is by getting the mean, the medium, and the mode of the data.
With little knowledge of statistics or data visualization people would notice that the Y-axis should start at zero because it could have a false visual comparison of the data
Believe it or not, a lot of data analysis can be done with Excel without having to jump into Python or R. Most of the time, a pivot table in Excel can answer the business questions needed by management to make timely decisions.