Please SHOW CALCULATIONS on how the answers are right. PLEASE help with ALL QUES
ID: 3047428 • Letter: P
Question
Please SHOW CALCULATIONS on how the answers are right. PLEASE help with ALL QUESTIONS!!!
1. Serum cholesterol concentrations are measured as part of a community study. The mean and standard deviation are given for women by age group Age (years) Cholesterol 45-49 50-54 55-59 60-62 229 ± 47 246 ± 50 255 ± 48 244 ± 36 Assuming serum cholesterol concentrations follow a normal (gaussian) distribution, which of the following is the probability that a woman between the ages of 50 and 54 years has a serum cholesterol concentration greater than 296 mg/dL? A) 1% B) 2.5% C) 5% D) 16% E) 95%Explanation / Answer
Solution1:
mean=246
sd=50
age group 50-54
P(X>296)
z=x-mean/sd
=296-246/50
=50/50
=1
P(Z>1)
pnorm(-1)
=0.1586553
0.1586553*100
=15.86%
=16%
OPTIOND