Question

Please help me with this question :> I will give you a shiny shiny medal :>

Answer 1

@jim_thompson5910

Answer 2

So would I do M < M0

A biologist thinks that the acidity of rain has decreased since then.​ (This would mean that the pH level of the rain has​ increased.) Am I interpreting this correctly? :>

Answer 3

Null is status quo: pH is 5.25

claim is in alternate hypothesis: pH is actually higher (less acidic, more basic)

Answer 4

So it is