The MTBF distribution of a machine that has passed the phase of early failures exhibits a normal distribution. The smaller the standard deviation of this distribution .

the more likely this machine will be a candidate for preventative maintenance.

Explanation: Mean, Time Between, Failure. (MTBF) follows normal distribution. The MTBF distribution of a machine that has passed the phase of early failures exhibits a normal distribution. The smaller the standard deviation of this distribution the more likely this machine will be a candidate for preventative maintenance. MTBF Is an acronym for Mean, Time Between, Failure.

answer; i believe that the correct answer is (scientific approach)

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.