Rviwa Discussion Course Materials Grades Assignment 2 (Numerical Descriptive Tec

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Rviwa Discussion Course Materials Grades Assignment 2 (Numerical Descriptive Techniques) Graded Graded Read Chaptor 4 | Back to Assignmant Due Sunday 10.01.17 at 1100 PM Attempts Score: /13 S. Measures of relative standing (percentiles and quartiles), interquartile range A growth chart is a plot of the peroentiles of growth measurements, such as weight and height, for a or children. Itis used by pediatricians to assess a child's growth over time. populatica The Centers for Disease Control and Prevention OOC) is a US health. Through one of its units, the National Center for Health Statistics (NOHS), the CDC has developed growth charts for dínical use by health professionals. The mast recent charts were published in 2000. agency devoted to the protect on and ronotona pee The 2000 CDC growth charts were developed using a reference population of infants. A pediatrician looks up one of the charts and finds that the sth percentile for weights of baby girls at 12-1/z months is 19.3 pounds. This means that of the 12-1/2-month-old baby girls in the reference population weigh less than 19.3 pounds or less, and of these baby girls weigh more than 19.3 pounds The 2000 CDC growth charts use a reference population of both breast-fed and formula-fed infants. It has been abserved that breast-fed babies bend to gain weight more rapidly than formula-fed babies in the first 2 to 3 manths of their lives, but they bend to weigh less than formula-fed babies from 6 to 12 months Sarah is a healthy baby who was exclusively breast-fed for her first 12 months Which of the fallowing is mast Ph description of her weights (at 3, 6, 9, and 12 months of age) as percenbiles of the CDC growth chart reference 75th percentie at 3 months; 40th perantie at 6 months; 25th perentie at 9 months; 25th perntie at 12 months 30th perentie at 3 months, sath per enble at 6 months; 70th percentile at 9 months, 80th perortile at 12 months O 85th percenble at 3 months; 85th percenble at 6 months 9ath percentble at 9 months; 95th percentle at 12 months 25th percentile at 3 rmonths; 25th percentile at 6 months; 25th percentie at 9 months, 25th peretie at 12 months The following are weights (in pounds) for a sample of 11 baby girls at the age of 10 manths 172 18.4 18.8 203 20.6 21.1 22 23.524.6 25 26.8 pounds The 80th percentile for these sareple data is out of 11 observations are less than the 8oth percentile, and out of 11 observations are In the sample data greater than this value. For any data set, the first quartile is the percentle, the second quartãe is the and the third quartile is the 58 AM KARD

Explanation / Answer

Ans:

1)5th percentile means that 5% of the 12 and half month baby weighs 19.3 pounds or less and 95% of the baby girls way more than 19.3 pounds.

2)Second option is correct(30th at 3 months,50th at 6 months,70th at 9 months ,80th at 12 mnths)

3)

80th percentile will be at position 11*0.8=8.8,it will be between 23.5 and 24.6

80th percentile of the above weights is 23.72

8 observations are less than 24.6 and 2 observations are greater than 23.72

First quartile is 25th percentile

Second quartile is 50th percentile

Third quartile is 75th percentile

First quartile for the above data set is 18.8

Third quartile is 24.05

IQR=24.05-18.8=5.25

17.2 18.4 18.8 20.3 20.6 21.1 22 23.5 24.6 25.4 26.8

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