business statistics
posted by Samantta .
An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lbft in the torque applied. A simple random sample of 35 nuts is selected, and the average torque to which they have been tightened is 150 lbft. What is the 95% confidence interval for the average torque being applied during the assembly process?

95% confidence interval is μ ± 1.96 SD.
I hope this helps. Thanks for askng.
Respond to this Question
Similar Questions

statistics
An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lbft in the torque applied. A simple random sample of 35 nuts is … 
business statistics
An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lbft in the torque applied. A simple random sample of 35 nuts is … 
statistics
Please only the formula and steps to do this problem. Thank you An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lbft … 
Vectors
A 50 N force is applied to the end of a 30 cm wrench and makes an angle of 30 degrees with the handle of the wrench. What is the Torque on the bolt at the other end of the wrench? 
statistics
A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater than .5 mm. A sample of 41 parts yields a sample standard deviation of .58 mm. At the .05 significance level, … 
physics
Three forces are applied to a box wrench. find the total torque about the bolt in newtonmeters caused by these forces. Is the torque a positive torque or a negative torque? 
Physics
A force of 32 N is applied at the end of a wrench handle that is 27 cm long. The force is applied in a direction perpendicular to the handle as in the diagram. (a) What is the torque applied to the nut by the wrench? 
Physics
Help Needed Please... After changing a tire on your car, you need to tighten one of the lug nuts to the proper specified torque of 49.0 N m. How much force is needed if you're pushing down on the end of the 39.0 cm long torque wrench … 
Physics
Help Needed Please... After changing a tire on your car, you need to tighten one of the lug nuts to the proper specified torque of 49.0 N m. How much force is needed if you're pushing down on the end of the 39.0 cm long torque wrench … 
Math
1. An assembly line produces widgets with a mean weight of 10 and a standard deviation of 0.200. A new process supposedly will produce widgets with the same mean and a smaller standard deviation. A sample of 20 widgets produced by …