Question

i have a hard time figuring out which formula's to use when solving problems. which would i use for the following:
if X is a normal random variable with mean u=60 and a Std Dev.=2 find:
A. p(x<58)
B. p(x>63)
C. p(57<X<64)

Answer 1

Z = (X-μ)/SD

Look up Z values in table in back of statistics book labeled something like "areas under normal distribution."

I hope this helps. Thanks for asking.