Question

According to chebyshev's theorem at least what percent of any set of observations will be within 1.8 standard deviations of the mean

Answer 1

84

Explanation:

Chebyshev's Theorem states that the proportion of data values that lie within k=2.5 standard deviations of the mean is at least

1−1k2=1−12.52=0.84

So at least 84% of the data lies within 2.5 standard deviations of the mean, for any distribution.