Which of the following is the portion of observations you would expect to see lying within a plus or minus 3 MAD range?
A)57.048 percent
B)88.946 percent
C)98.334 percent
D)99.856 percent
E)100 percent

Question

Quizplus · Accepted Answer

The MAD (Mean Absolute Deviation) is a measure of dispersion that gives an idea of how spread out a data set is. Roughly 98.334 percent of the observations are expected to lie within a plus or minus 3 MAD range, assuming a normal distribution. This range is known as the 3-sigma rule, which states that nearly all values (99.7%) lie within 3 standard deviations of the mean. Since MAD is a similar measure of dispersion as standard deviation, the 3-sigma rule can also be applied to MAD.

Which of the Following Is the Portion of Observations You