Suppose mr. nicholson plans on working for his new employer for at least 9 years. use each of the recursive models to determine mr. nicholson’s potential annual salary as a nine-year veteran with the company. in your final answer, include all of the necessary calculations.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.