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Chapter 3 Review Homework Question 19
Chapter 3 Review Homework
19.
(a) Explain the meaning of “The 10th percentile of the head circumference of males 3 to 5 months of age in a certain city is 41.5cm.” Choose the correct answer below.
- 10 % of 3- to 5-month-old males have a head circumference that is 41.5 cm or less.
- 10% of males have a head circumference that is 41.5 cm or less.
- 10% of 3- to 5-month-old males have a head circumference that is 41.5 cm or more.
- 90% of 3- to 5-month-old males have a head circumference that is 41.5cm or less.
(b) Explain the meaning of “The 80th percentile of the waist circumference of females 2 years of age in a certain city is 49.8cm.” Choose the correct answer below.
- 80% of females have a waist circumference that is 49.8cm or less.
- 80% of 2-year-old females have a waist circumference that is 49.8cm or more.
- 20% of 2-year-old females have a waist circumference that is 49.8cm or less.
- 80% of 2-year-old females have a waist circumference that is 49.8cm or less.
(c) Anthropometry involves the measurement of the human body. One goal of these measurements is to assess how body measurements may be changing over time. The included table represents the standing height of males aged 20 years or older for various age groups in a certain city in 2015. Based on the percentile measurements of the different age groups, what might you conclude?
At each percentile, the heights generally _______ as the age increases. Assuming that an adult male does not grow after age 20, the percentiles imply that adults born in 1990 are generally _____ than adults who were born in 1950.