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 observations are within k standard deviations of the mean. For k=3, this is 1 - (1/3^2) = 1 - 1/9 = 8/9, which is approximately 88.89%.

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