Question

low - density lipoprotein (ldl) is an important part of blood cholesterol test. ldl higher than 130mg/dl is a risk factor of developing cardiovascular disease. to prevent cardiovascular disease, a health center had a free blood cholesterol test for all the people older than 65 in the community. a total of eight people attended the blood screening and their blood test results are listed below: ldl(mg/dl): 130,143,114,110,123,110,134,124. after the blood test, the nurse wants to know the median ldl score: correct answer(s): a. 123.5 b. 110 c. 114

Explanation:

Step1: Arrange data in ascending order

$110, 110, 114, 123, 124, 130, 134, 143$

Step2: Determine position for median

Since $n = 8$ (even number of data - points), median is the average of the $\frac{n}{2}$th and $(\frac{n}{2}+ 1)$th ordered - data values. $\frac{n}{2}=\frac{8}{2}=4$ and $\frac{n}{2}+1 = 4 + 1=5$.

Step3: Calculate median

Median=$\frac{123 + 124}{2}=\frac{247}{2}=123.5$

Answer:

A. 123.5