Am doing degree course and stuck on statistics question, need resolved quickly. Research hypothesis : The time served in the Australian construction industry has an effect in relation to...

Am doing degree course and stuck on statistics question, need resolved quickly.

Research hypothesis: The time served in the Australian construction industry has an effect in relation to incident/injury reporting.

Null hypothesis:
The time served in the Australian construction industry has no affect in relation to incident/injury reporting.
Whilst I have the data on attached excel spreadsheet and basic answer, it is not the scientific one I need. Have been playing around trying to find best solution, t-tests etc. and cant find best solution. I need resolved and workings please. Not worried about written explanation that much, more on the scientific stats workings.


Excel sheet attached