The Completion Times for a Certain Marathon Race Was 2

Multiple Choice

The completion times for a certain marathon race was 2.4 hours with a standard deviation of 0.5 hours. What can you determine about these data by using Chebyshev's Inequality with K = 2?

A) At least 75% of the completion times are between 1.4 hours and 3.4 hours.
B) No more than 75% of the completion times are between 1.4 hours and 3.4 hours.
C) At most 88.9% of the completion times are between 1.4 hours and 3.4 hours.
D) At least 88.9% of the completion times are between 1.4 hours and 3.4 hours.