Assume the random variable X is normally distributed with mean mu

equals

=50

50 and standard deviation sigma

equals

=7

find the 77th percentile.

The 77 th

----------------------------------------------------------------

Find thez-scores that separate the middle 47

47% of the distribution from the area in the tails of the standard normal distribution.

z scores are?

----------------------------------------------------------------------

Determine the total area under the standard normal curve in parts (a) through (c) below.

(a) Find the area under the normal curve to the left of z equals

=negative 2

2 plus the area under the normal curve to the right of z equals

=2

2.