"Bacteria in a culture can live for an average of two hours with a standard deviation of 15 minutes. How long can we
expect at least 75% of the bacteria to live?"
1. What is the mean?
x = __ hours= ___ minutes (Convert the number of hours to minutes.)
2. What is the standard deviation? s = ___ minutes
3. According to Chebyshev's Theorem, how many standard deviations contain at least 75% of the data? k =
4. We can expect the at least 75% of the bacteria to live between ___ and ___
minutes. (Enter x - ks in the first & x+ks in second blank)
