What is the recommended statistical tool example/webinar for analysing multiple variable analysis of extreme values?

I would like to analyze the effects natural gas volatility has on the price of electricity. The goal is to include numerous y variables such as population, GDP, CPI, Peak power demand, natural gas cost, and the price of electricity as an independent variable (power pool price). The level of influence of all variables and the effects of the maximum to minimum price of natural gas.

To explain further, once the level of influence certain y variables have on the dependent variable is determined, the variables with the greatest influence would be varied in the model to demonstrate the effects on the price of electricity x variable. (It is expected natural gas will have the greatest influence.)

Thanks

Answer 1

[BERGHOUT Tarek]

you can use T test