The report supports the hypothesis. is Ok
The report endorse the hypothesis.Fine but endorse
s
The report confirm that the hypothesis was right. Ok, but confirmed or confirms that the hypothesis was (is) right
The report confirm that the hypothesis WAS right.( confirmed or confirms)
The report confirm that the hypothesis IS right.(confirms or confirmed, that depends)
The report confirmed that the hypothesis was right. Ok
We have to confirm whether the hypothesis is right.7. We have to check whether the hypothesis is right. Both are Ok. Confirm implies to find any proof for confirmation and check implies whether given proofs are right or not. That's my humble opinion
