A pediatrician tested the cholesterol levels of several young patients. The foll

Question

A pediatrician tested the cholesterol levels of several young patients. The following a. What percentage of patients have cholesterol levels between 200 and relative-frequency histogram shows the readings for some patients who had high204,inclusive? cholesterol levels. 10% b. What percentage of patients have levels of 215 or higher? 35 % c. If the number of patients is 20, how many have levels between 205 and 209 0.4 0.3 0.2 inclusive? 195 205 215 225 Cholesterol level patients Use the graph to answer the following questions. Note that cholesterol levels are always expressed as whole numbers.

Explanation / Answer

a) The percentage of patients have cholestrol levelts between 200 and 204, inclusive is 10%

b) The percentage of patients have levels of 215 or higher is =(0.15+0.2) = 0.35 = 35%

c) The number of patients between 205 and 209 , if there are 20 patients are 0.15*20 = 3 patients

Cholestrol Level Relative Freq 195-199 0.1 200-204 0.1 205-209 0.15 210-214 0.25 215-219 0.15 220-224 0.2

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