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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.

Nikita wants to apply for student aid to fund her college education. arrange the steps involved in nikita’s application for financial aid

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal