The 4th question of Week 4 Quiz 2 accepts the statement shown in the picture as valid, but it doesn’t make sense for me, because this way H0 and H1 are practically the same thing. They overlap each other instead of being mutually exclusive.
Another answer shuldn’t be accepted as right because the inequality is inverted. It says “the alternative hypothesis is that mu after is higher than before”, but the formula shows the opposite, that after is less than before.
Thanks for flagging this issue. This was indeed a typo. I have fixed it now.
Cheers,
Lucas
Dear @lucas.coutinho , I confirmed you fixed the second issue, but what about the first one? Maybe it is not an issue, but I can’t understand why… Could you give us an insight about it?
Oh, you are correct, the first option should be H_0 \text{ before} \geq \text{after} and H_1 \text{ before} < \text{after}.
Sorry for the confusion, I have switched the \mu_{before} and \mu_after in some previous revisions and this messed up everythin. My bad!
Now it should be fine!
Thanks again.
Cheers,
Lucas
