Precision manufacturing: A process manufactures ball bearings with diameters that are normally distributed with mean millimeters and standard deviation millimeter. Round your answers to at least four decimal places

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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.