Mathematics, 24.07.2019 11:00, quay39
Ursula and her friends are playing hoop rolling. ursula rolls a large hoop on the ground. the hoop rotates 3/2pi radians in one second. how many revolutions does it make in 1 minute
Answers: 1
Mathematics, 21.06.2019 19:40, evarod
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.
Answers: 3
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