Actually I think the answer is 1E-23 since the answer is so small the calculator rounds it or something
If the E-value of a match is 1E-23, what is the probability of 1 or more matches this good or
better for a random query sequence?
So I did 1- e^(-1E-23)= the answer
I got zero for an answer and my teacher says "in spite of what your calculator says, the answer to is not zero."
Link to the worksheet: 2011-02-15_2205 - trinhn812's library
We are dealing with a Binomial distribution with an unknown number of Bernouli trials and single trial success probability so:
If the probability of a match with a single random record is and there are records then:
Now the probability on no matches in records is (since is small):