  We found 140 neutrino-induced muons in 854.24 live days in the MINOS far
detector. We looked for evidence of neutrino disappearance in this data set by
computing the ratio of the number of low momentum muons to the sum of the
number of high momentum and unknown momentum muons for both data and Monte
Carlo expectation in the absence of neutrino oscillations. The ratio of data
and Monte Carlo ratios is consistent with an oscillation signal. A fit to the
data for the oscillation parameters excludes the null oscillation hypothesis at
the 94% confidence level. We separated the muons by charge sign in both the
data and Monte Carlo events and found the ratio of the total number of negative
to positive muons in both samples. The ratio of those ratios is a test of CPT
conservation. The result is consistent with CPT conservation.
