I need help I'm confused
...
Answers: 1
Mathematics, 21.06.2019 19:40
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
Mathematics, 21.06.2019 21:20
Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18
Answers: 2
Mathematics, 08.01.2021 21:40
Social Studies, 08.01.2021 21:40
Mathematics, 08.01.2021 21:40
Arts, 08.01.2021 21:40
Mathematics, 08.01.2021 21:40
Mathematics, 08.01.2021 21:50
Mathematics, 08.01.2021 21:50
Mathematics, 08.01.2021 21:50
Mathematics, 08.01.2021 21:50