Thank you. Good point about "to establish bias". As for quant and statistical analysis, I doubt mom and pop retail traders like me can do that with nothing but an Excel spreadsheet.
Actually we can. I use Excel exclusively, but I analyze a limited amount of time series points and risk/reward variables. No need to engage in more complex analysis unless your lacking a competitive advantage. At that point you can assume your predictive model/trade management are poorly structured. Unfortunately many quants don't get this and overanalyze data into the abyss.
Here is some recommended reading:
http://www.priceactionlab.com/Blog/2016/01/quant-trader/