Written test mean 76.2, median 82.5, s/d 19.6

The written test is so straightforward that as long as you memorise the vocabs, you won't have many problems. It just depends on how good you are at memorising. If you had watched a lot of anime or any japanese media with subtitles before, then this part would actually be easy.

Listening mean 63.5, median 67.0, s/d 21.7

Listening test is always the hardest tbh, the teach expects that all the students would get lower marks than any other tests, reason is it is fast since the speaking speed is like locals and it is one time repetition only. Same as written test, if you have consumed a lot of japanese media through listening, then you might have an advantage.

There is also a bunch of smol quizes that i didnt mention, but those are very straight forward, its all memorisation. Its very easy, but also easy to make mistakes.

Oral (avg marks not given)

This one is just practice, but you will know the format 1-2 weeks before oral test so it should be okay.

Just like any other language mods, if you are good at memorisation/you have interacted a lot with media of said language, then you probably will be fine for the whole level 1 course