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Other questions on the subject: Mathematics
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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.
Answers: 3
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30, allisonboggs85
Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30, baltazmapa629n
The length of a field is 100 yards and its width is 75 yards. if 1 inch represents 25 yards, what would be the dimensions of the field drawn on a sheet of paper?
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 01:00, sierraseideman1023
X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20
Answers: 3
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