Point 3 of 12 — Unit 4: Statistics — Measures of DispersionQuestion bank: 0 questions (0 with pictures)
034-3 The range
Range = greatest value − least value; it uses only two numbers, so it is easy but sensitive to extreme values.
From a frequency table read the largest and smallest value with a non-zero frequency, not the largest frequency.
From a stem-and-leaf plot the extremes are the first and last leaves with their stems.
For a continuous class interval, the range is usually taken as the difference between the upper boundary of the last class and the lower boundary of the first class.
The range carries the same unit as the data (it is not squared).
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