lcat Use by Reaith professionals. The most recent charts were published in 2000.

Question

lcat Use by Reaith professionals. The most recent charts were published in 2000. The 2000 CDC growth charts were developed using a reference population of infants. A pediatrician looks up one of charts and finds that the sth percentile for weights of baby girls at 12-1/2 months is 19.3 pounds. This means that the of the 12-1/2-month-old baby girls in the reference population weigh less than 19.3 pounds or less, an 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 ob that breast-fed babies tend to gain weight more rapidly than formula-fed babies in the first 2 to 3 months of their they tend 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 following is mast lk description of her weights (at 3, 6, 9, and 12 months of age) as percentiles of the CDC growth chart reference pop 7Sth percentile at 3 months; 4ath percentile at 6 months, 25th percentile at 9 months; 2Sth percent eat 12 months 30th percentile at 3 months, 50th percentile at 6 months, 70th percentile at 9 months, 80th percenble at 12 months O 85th peroentile at 3 months; 85th percenbile at 6 months; 90th percentle at 9 months, 95th percentle at 12 manths 25th percentile at 3 months; 2sth percentile at 6 months; 25th percentile at 9 monthsi 25th perentie at i2 months The following are weights (in pounds) for a sample of 11 baby girds at the age of 10 months: 17.2 184 18.8 20.3 20.6 21.1 22 23.5 24.6 25.4 26.8 The 80th percentile for these sample data is pounds. In the sample data, greater than this value. out of 11observatins are less than the 80th percentle, and .ut of 11 For any data set, the first quartile is the percentile, the second quartile is the percent le and , and the third quartile is the percentile In the prior sample data, the first quartile is interquartile range is pounds, and the third quartile is Therefore, the 858 AM 9/25/2017

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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