Question

The serum cholesterol levels in men aged 18 to 24 are normally distributed with a mean of 178.1 and a standard deviation of 40.7. A group of 9 men aged 18 to 24 randomly selected.
1. Find the probability that there are at least 2 men in the group whose serum cholesterol level is at most 230.
2. Suppose 90% of men's serum cholesterol level is less than c. What is the value of c?

Related Questions

Experts consider high serum cholesterol levels to be associated with an increased incidence of coron... The cholesterol levels of young women aged 20 to 34 vary approximately normal with mean 185 milligra... The serum cholesterol levels for men in in one age group are normally distributed with mean of 178.1... 1.The distribution of serum levels of alpha tocopherol (serum vitamin E) is here assumed to be distr...