Question

Provide an appropriate response. Use the Standard Normal Table to find the probability. 11) The distribution of cholesterol levels in teenage boys is approximately normal with 170 ando - 30 (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. A) 0.0718 B) 0.0012 C) 0.0606 D) 0.0336

Answer 1

given data are

population mean u=170

population sd $\sigma$=30

sample mean x =225

in a z normal distribution z =(

(X - μ)/σ

z=(225-170)/30

= 55/30= 1.8333

p (x greater than 225)= p (z>1.83)

= 1- p (z$\leq$1.83)

= 1- 0.9664

= 0.0336

option D