The two-way frequency table shows data on accidents in the last year for drivers who took a driver
safety course.
Driver Safety
Course
Total
No Driver Safety
Course
35
28
63
Accident within
the last year
No Accident
within the last
year
Total
97
104
201
125
139
264
Given that a driver took the driver safety course, what is the chance that the driver still got in an
accident? Round your answer to the nearest whole number.

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.