Write an inequality to describe the region consisting of all points between (but not on) the
spheres of radius 
and 
centered at the origin.
Definitions:
Range
The gap between the maximum and minimum figures within a dataset.
Median
The middle value in a list of numbers, which separates the higher half from the lower half of the data set.
IQR
Interquartile Range, a measure of statistical dispersion, which is the difference between the 75th and 25th percentiles of the data.
Range
The difference between the highest and lowest values in a dataset, indicating the spread of the data.
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