Originally Posted by

**yopy** well, i have a calculator, but i also have a z table in the back of my book. But i dont know if this question is supposed to be related to the z table, we covered that topic a while back and are learning new stuff at the moment, but then again your guess is as best as mine, anyways,

my z value for a would be -1.28, which is .1003 ( there is not .1000 value)

then for the second part, the table shows .5199 which correpsonds to .05

these are values coming from standard normal cumulative probabilities

does this sound right?