Hello, everyone! I hope you are all well. Could you please help me with this question?

I got this equation for the relative weights of chemical parameters: Wi = wi/n ∑ i = 1 wi. Where, Wi = the relative weight; wi = the weight assigned to each individual parameter. How can I determine the weights assigned to each parameter? Some articles ascribed a weight to pH of 5, whereas others used 3 or 2!!

Best regards,

Waheeba :)