The body mass index (BMI) of a person is defined to be the person's body mass divided

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The body mass index (BMI) of a person is defined to be the person's body mass divided by the square of the person's height. The article "Influences of Parameter Uncertainties within the ICRP 66 Respiratory Tract Model: Particle Deposition" (W. Bolch, E. Farfan, et al., Health Physics, 2001:378-394) states that body mass index (in kg/m2) in men aged 25-34 is lognormally distributed with parameters μ = 3.215 and σ = 0.157.
a. Find the mean BMI for men aged 25-34.
b. Find the standard deviation of BMI for men aged 25-34.
c. Find the median BMI for men aged 25-34.
d. What proportion of men aged 25-34 have a BMI less than 22?
e. Find the 75th percentile of BMI for men aged 25-34.
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