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Earn +20 ptsQ: What is the equation of interquartile deviation?
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What are the common measures of dispersion?
Range, standard deviation, variance, root mean square, interquartile range
What does interquartile range mean?
The interquartile range is the upper quartile (75th percentile) minus (-) the lower percentile (75th percentile). The interquartile range uses 50% of the data. It is a measure of the "central tendency" just like the standard deviation. A small interquartile range means that most of the values lie close to each other.
In which area of calculation quartile deviation is used?
Graphing to determine difference between third and first quartile as well as to find the median between the two. Also known as semi-interquartile range.
Why is the interquartile range a more appropriate measure for spread than the range?
the interquartile range is not sensitive to outliers.
What is unaffected by outliers?
interquartile range
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