Mrs. Crown gave a typing test to her students. She recorded each student's average typing speed, in words per minute. The dot
plot below shows the recorded data
Average Typing Speed
20
22
24 26 28 30 32
Words Per Minute
34
36
Which of the following is the best measure of variability for the data?
A
interquartile range
B. mean absolute deviation
median
D. mean
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