assume distributed

assume distributed normally.

and what about P(X>=54)?

Thanks in advance.

- Oct 22nd 2007, 07:26 AMbeetzCan't remember how to calculate this: P(X< = 54) with mean 63.5 and s.dev. 12.2;
assume distributed

assume distributed normally.

and what about P(X>=54)?

Thanks in advance. - Oct 22nd 2007, 08:25 AMgalactus
Just use $\displaystyle z=\frac{x-{\mu}}{\sigma}$

- Oct 22nd 2007, 09:14 AMbeetz
the answer i obtain from that is my final answer, correct?

- Oct 22nd 2007, 09:28 AMgalactus
You will have to look up the probability in the z-table which corresponds to the z-score you find from the formula.