Can someone tell me how to do this? This is so confusing to me.
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Mathematics, 22.03.2021 18:10 joe805
Can someone tell me how to do this? This is so confusing to me.
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Mathematics, 21.06.2019 16:40, lawrencebenoit7194
This question awards 100 ! i really don’t want to fail i will also mark you !
Answers: 2
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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.
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