Can a mathematically sound prediction interval have a negative lower bound?

Gut feeling/prediction about a plane crash?

• I love to travel. I love airports, flying, just getting out of the country I live in. This October, my school is running a trip to New York. It's an 7 hour flight and a 5 day stay. As someone who loves fashion - I would absolutely love to go and my parents have agreed to let me go/pay. At first glance of the sheet, I decided I really wanted to go. The night following, I just had this weird - hard to put a finger on issue with going. Did I not want to go with my family? Would I rather go when I'm older and maybe doing something in fashion? I couldn't see WHY I didn't want to go. And as days passed, I developed this like gut feeling/prediction that the plane would crash. It's crazy because I love traveling/ don't get nervous. I can see it crashing on the way back and like, I can just see the faces of the teachers.. I don't believe in physic abilities. Hell, even I sound crazy to MYSELF but there's just signs that are making me so paranoid. 1) The art department is doing this trip. One day, during REALLY bad wind, the like roof was shaking and stuff, nearly falling, giving me such a fright. Like, the reaction of teachers and pupils that were there is how I imagine the plane crash.. :/ 2) I've been having stupid, little predictions. Now, I've had deja vu alot. But this is weird. Last week, I had this feeling this teacher would be taking us on a field trip. He was. Today, waiting on my mum to pick me up, I thought that my English teacher would walk down the hill, a random though. I turn around, and there she is. I sound crazy, I know. I am, in no way, trying to say I have supernatural abilities. What I am trying to say is that this gut feeling is really preventing me from wanting to go on this trip. I know I can push myself to just say "whatever" and go but the feeling is just there. I know the extremely low chances of a plane crash and I know I worry far too much. I've always been scared to go to New York really; I've always had this image of it being full of guns (again, random; but I was like 4/5!) etc. Then, as much as I hate to say this, I guess I'm scared after 9/11 too (it could happen anywhere; I know). So, I'm torn between allowing this feeling to control me or going. I just believe it. I can't see me returning like planned; maybe I will survive..my mind is just spinning. I think I should also state that we had a trip to France last September via bus. It crashed (no one was injured) and my friend took my belt off like an hour before, and I woke up like half an hour before the bus crashed out of chance. Maybe it's just post-trauma after this accident? Another but - I'd go traveling again; just not to New York on this date. So, has anyone else had these feelings/predictions and everything turned out OK? Please, I need to make my mind up before Monday and I've been getting so worked about it. Many thanks and I hope no one thinks I'm just over-reacting!

• Answer:

  I think you should go because your mind is just scared and thinking about scary stuff happening because of what has happened before (9/11) but also imagining NY full of guns. I guess your mind is just in a state of fear, get passed it. This is your fear and you need to get passed that, get stronger and overcome your fear!