Posted: September 11th, 2016

Compare the proportions of the boys and girls who have total cholesterol less than 205 mg/dL, and explain the difference?

The box-whisker plots in the above figure shows the distributions of total cholesterol levels (in mg/dL) in boys and girls 10 to 15 years of age.
Please, comment on the figure, taking the following into consideration:
a) What are the median total cholesterol levels in boys and in girls?
b) Compare the proportions of the boys and girls who have total cholesterol less than 205 mg/dL, and explain the difference?
c) Are there any outliers in total cholesterol levels in boys or in girls? Please, verify.
d) Explain the value of using box-and-whiskers plots in displaying the total cholesterol level for boys and girls.
e) What numerical summary measures would be most appropriate to present the total cholesterol levels for boys and girls?

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