# Can't remember how to calculate this: P(X< = 54) with mean 63.5 and s.dev. 12.2;

• Oct 22nd 2007, 08:26 AM
beetz
Can't remember how to calculate this: P(X< = 54) with mean 63.5 and s.dev. 12.2;
assume distributed
assume distributed normally.

Just use $z=\frac{x-{\mu}}{\sigma}$