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May
What Do Percentiles Mean. Developed by the World Health Organization WHO the percentiles on infant growth charts are based on surveys of 19000 breastfed children in five different cities in five countries who grew up in optimal conditions. Unlike the percentage scores percentile ranks are not an indication of how many questions your child answered correctly or what your child does or does not know. Percentile scores for individual test takers represent how an individual test takers score compares to the scores of other test takers within a particular comparison group. Percentiles ARE NOT equivalent to scores.
Instead the scores indicate how well your child did relative to other students who have also taken the test ie how his skill level compares to that of their peers. In other words shes kind of small. A percentile is a value or the average of two values in the data set that marks a certain percentage of the way through the data. Percentile or centile is a value or number that represents a percentage position on a range or list of data the person or thing at that number of value is above that number in percentage. Adding to that what is a good percentile rank. Deciles are similar to Percentiles sounds like decimal and percentile together as they split the data into 10 groups.
They tell you where a score stands relative to other scores.
The 1st decile is the 10th percentile the value that divides the data so 10 is below it The 2nd decile is the 20th percentile the value that divides the data so 20 is below it etc. What do percentile ranks mean. 27th percentile means that shes bigger than 27 of babies of her gestation. What really matters is the rate of growth. A normal rate of growth means the childs growth points closely follow a percentile line on the chart. For example a person with an IQ of 120 is at the 91 st percentile which indicates that their IQ is higher than 91 percent of other scores.