It has been shown that the GDP (Gross Domestic Product) of countries around the world surprisingly closely matches the lognormal distribution. In Chapter 5, we will discuss this lognormal distribution, such as the age at death of the elderly, the length of nursing care, and the weight distribution of children. ・Weight is approximated by the logarithmic formula of the product of body fat percentage and height (cubed). Therefore, weight tendencies to have a lognormal distribution. ・The more lognormal the weight distribution becomes (the tail widens to the right), the more obese there is in the population.
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