Fri 20 Apr, 2012 08:13 pm
Can someone help me figure out these questions on my homework?? how do I work them out??
4. Determine whether the following is a probability distribution. If not, identify the requirement that is not met.
X 0 1 2 3 4 5
P(x) 0.243 0.167 0.213 0.149 0.232 0.164
5. The Police Department reports that the probabilities that 0, 1, 2, 3 and 4 car thefts will be reported in any given day are 0.091, 0.218, 0.261, 0.209 and 0.125, respectively. Determine if this is a probability distribution. If not, identify the requirement that is not satisfied.
What must the sum of the probabilities equal?
Im not sure, thats all the problem gives??
Let me rephrase that:
For it to be a probability distribution, what must the sum of the probabilities be?