Chebyshev's Theorem states that for any set of nubmers the fraction which will lie in K standard deviations of the means is at least 1-1/2. Use this theorem to find the fraction of all the mumbers of a data set that must lie within 4 standard deviations from the mean.
At least ___ of all numbers must lie within 4 standard deviations from the mean. (Type an interger or a fraction).