The distribution of cholesterol levels in teenage boys is approximately normal with and (source: u. s. national center for health statistics). levels above 200 warrant attention. find the probability that a teenage boy has a cholesterol level greater than 225.

0.033 is the probability that a teenage boy has a cholesterol level greater than 225.

Step-by-step explanation:

The following information is missing in the question:

Mean, μ = 170

Standard Deviation, σ = 30

Using the given information, we may solve the question as:

We are given that the distribution of distribution of cholesterol levels in teenage boys is a bell shaped distribution that is a normal distribution.

Formula:

a) P( cholesterol level greater than 225)

P(x > 225)

Calculation the value from standard normal z table, we have,  

0.033 is the probability that a teenage boy has a cholesterol level greater than 225.

b

step-by-step explanation: