Originally Posted by

**Bradley55** Okay, so after doing my calculations i got the expected value of 1.

questions "a" asks for the mean and standard deviation for c.

Isnt the mean 1.5? just (3+2+1+0 / 4 = 1.5)? Mr F says: This is only true if each value has the same probability of occuring.

What do you think the mean value of 1 and 11 is if the probability of 11 occuring is 0.99999 and the probability of 1 occurring is 0.00001 ....? Would you argue (1 + 11)/2 ....?

And my notes only reminded me of this, they are incomplete :( , Mr F says: ?

so if i did any of this right what should be my next step?