Amanufacturer produces piston rings for an automobile engine. it is known that ring diameter is normally distributed with millimeters. a random sample of 15 rings has a mean diameter of . construct a 99% two-sided confidence interval on the true mean piston diameter and a 95% lower confidence bound on the true mean piston diameter.

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y

the correct answer is d

hope this

what is the model?

step-by-step explanation:

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.