Question 1159277
because expect O to be < C, make Ho: O is >= C and Ha: O is less than C which is C for the letter choice
it is a left-tail test, because we expect the change to be on the left or negative side.
the test statistic is t=-1.17,  p-value is 0.12

Fail to reject Ho: insufficient evidence to conclude that mu O is less than mu C.