Lijim

I'm beginning a new unit in class on probability sets but I don't know what the U and upside down U symbols mean.

A binomial experiment consists of 9 independent trials. The probability of success in each is 0.4. Using tables find p(x less than or equal to 3) Set up like this? X. 1 2 3 4 5 6 7 8 9. P(x=x) .4 .4 .4 .4 .4 .4 .4 .4 .4

P(z>1.11). Is a trick to change > to < and convert the number to negative? Like this p(z<-1.11)?

A coin is weighted so that the probability of obtaining a head in a single toss is .4. If the coin is tossed 25 times, what is the probability of obtaining fewer than 10 head? For this problem, I found the mean and standard deviation first. I got 10 for t...

How many different 6 letter "words" can be formed from the letters C,A,N,Y,O,N if: O must be last, A must be first and repetitions aren't allowed. Here is how I set it up: A ? ? ? ? O (? Represents blanks) so 4!?

I think U is union but I'm not sure about the upside down U.

D = {x E U l is a doctor } M = {x E U l is a male} (the administrator, nurses, and women also have the same notation as above.I also know it is not E but I don't have that symbol) But for D (upside down U) complement of M would I describe it as enployees...

Its supposed to be a distribution table but it's sloppy since I'm writing from my phone.

Then it asks for the mean and standard deviation. The mean is 18 and SD is 25 right?

With the z value being 0.1357?

I'm confused. How is it .4207 and not .5000?

I used n times p for the mean and the square root of npq for the standard deviation

I already wrote my answers?????