# Search results

1. ### emperical rule

I really have no idea what I have to do there. Can maybe someone tell me what steps I have to take to get to the answer? Thanks in advance!:)
2. ### emperical rule

does anyone understand this question? Thanks in advance!
3. ### joint probability

I am not really sure how to calculate question C. Can anyone help me out? Thanks in advance!
4. ### normal distribution

thank you very much, but I still don't really understand the second question.. Can someone write it out step by step? :)
5. ### normal distribution

Hi everyone! I have a question about the answer of question 19a and e. question a: Find the probability that X is greater than 60. Why do they do 0,5 -0,3944 and not 1 - ...? Question e was: the probability is 0,05 that X is in the symmetric interval about the mean between which two numbers...
6. ### poisson distribition question

Hello everyone, I don't really understand the answer of question a. The question was: Find the probability that on any given day there will be fewer than two breakdowns on this highwayduring the morning rush hour. Additional information: on average: 3,2 breakdowns per day occur. isn't it...