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Mathematics, 09.10.2019 14:30, xxaurorabluexx
Asurvey of 898 u. s. vcr owners found that 16% had vcr clocks that were currently blinking ā12: 00.ā (source: wirthlin worldwide) the population is the 898 owners. true or false
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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.
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Asurvey of 898 u. s. vcr owners found that 16% had vcr clocks that were currently blinking ā12: 00.ā...
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