Hey folks, I've hit my very weak spot. Probability and Statistics
I have a problem here, and I REALLY want to use but it's not giving me the right answer, and I've tried using and all to no avail. I have the correct answer to reference, but I cannot for the life of me seem to get to it, any help would be appreciated!
The problem is this:
Right off the bat I think and the first step to me seems like it should be using because of the words at least, rather than exactly.In one town, 74% of the homes have satellite dishes. A pollster randomly sampled 50 homeowners from the town. What is the probability that at least 42 of them have satellite dishes? Round your answer to 4 decimal places.
This isn't working at all, the correct answer to the problem is .
Again, any help or clarification at all would be great, thanks!
Oh I see, that makes sense. So is used to calculate probability of EXACTLY n events occurring, while is the probability of AT MOST n events occurring. So when asked for AT LEAST, I can find this by subtracting the probability of AT MOST from 1, giving me the probability of a value occurring above that value of k, right?