Answer
1hr24minutes to 4hr36minutes
Work Step by Step
Chebyshev’s theorem The proportion of values from a data set that will fall within k
standard deviations of the mean will be at least $1−1/k^2$, where k is a number greater
than 1 (k is not necessarily an integer).
35. Time Spent Online Americans spend an average of
3 hours per day online. If the standard deviation is
32 minutes, find the range in which at least 88.89%
of the data will lie.
Let $1-1/k^2=0.8889$ we have $k=3$ and $3s=3\times32=96$minutes or 1hr36minutes.
The range will then be 1hr24minutes to 4hr36minutes
