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) 99.7%
B) 88.89%
C) 75%
D) 67%

Question

Quizplus · Accepted Answer

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

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