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The sample range could be used as an index of dispersion. However, there are objections. One is that this statistic is obviously sensitive to outliers. Another is that for many population distributions there are measures with much better characteristics, even ignoring the problem of outliers.
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What is despersion?
Dispersion is an abstract quality of a sample of data. Dispersion is how far apart or scattered the data values appear to be. Common measures of dispersion are the data range and standard deviation.
What does a small head circumference mean at 30 week scan?
During a pregnancy the head circumference, abdominal circumference, Fumur and Amniotic Fluid index are monitored and measured at scans to check they are growing within the normal range e.g 10th, 50th and 90th centiles. Anything outside of the 10th and 90th range is considered not to be 'normal' and could be a sign of a problem. If the head circumference is measured and found out of this range e.g below the normal range then it could be a sign of FAS, Microcephaly or another type of mental disorder. However, any measurements within this range is considered to be normal. The question is difficult to answer because it depends on what "small" actually means, like I say, if it is below the 10th centile range then it is too small and there COULD be a problem but if it has been measured to be within the normal range then the baby could just have a petite head with no mental issues.
What does the Russell 2000 Index measure?
The Russell 2000 Index is a stock market index that measures the performance of approximately 2,000 small-cap companies in the United States. It is often used as a benchmark for small-cap stocks and is considered a key indicator of the overall health of the U.S. economy. The index is maintained by FTSE Russell, a leading global index provider, and is widely followed by investors and financial professionals.
Why fisher index is the ideal index?
becaused it is exact
Disadvantages of index number?
disadvantages of index numbers
