Serum cholesterol levels in men aged 18 to 24 years have a normal distribution with a mean
178.1mg/100 ml and standard deviation 40.7 mg/100 ml.
The. Randomly choosing a man between 18 and 24 years old, determine the probability of
your serum cholesterol level is less than 200.
B. Whether a serum cholesterol level should be judged too high if it is above 7%
higher, determine the value of the separation level of levels that are too high.
w. Determine a 90% reference range for serum cholesterol level among men
from 18 to 24 years old.