AQA A-level Further Mathematics Paper 3 Statistics (7367/3S) - 14 June 2023

I think it went alright but I forgot the constant of integration in the CDF part and that probably lost me 3 matks because I had no working, just everything else with the limits apart from the 2, I’m also worried about the 7 marker hypothesis test with Poisson and I got X~Po(43) for one of the question

I think it went alright but I forgot the constant of integration in the CDF part and that probably lost me 3 matks because I had no working, just everything else with the limits apart from the 2, I’m also worried about the 7 marker hypothesis test with Poisson and I got X~Po(43) for one of the question

i got X~Po(43) (wrote it as X+Y~Po(43))

I think it went alright but I forgot the constant of integration in the CDF part and that probably lost me 3 matks because I had no working, just everything else with the limits apart from the 2, I’m also worried about the 7 marker hypothesis test with Poisson and I got X~Po(43) for one of the question

am I being dumb or do you not need +c?

Because you use integration limits of the lowest value in the domain (I can't remember what it was) and then an upper integration limit of x, and you integrate f(t). Hence no constant of integration is required because if you have a non-zero lower value you find the constant, if it's zero then there isn't a constant.

Please correct me if I'm wrong though