According to the Chebyshev rule, at least what percentage of the observations in any data set are contained within a distance of 3 standard deviations around the mean?
A) 67%
B) 75%
C) 88.89%
D) 99.7%

Question

Quizplus · Accepted Answer

The Chebyshev rule states that for any data set, at least (1 - 1/k^2) of the data values will fall within k standard deviations of the mean. For k=3, this is (1 - 1/3^2) = 88.89%.

According to the Chebyshev Rule, at Least What Percentage of the Observations