A production line produces rulers that are supposed to be 12 inches long. A sample of 49

of the rulers had a mean of 12.1 and a standard deviation of .5 inches. The quality control

specialist responsible for the production line decides to do a two-sided hypothesis test to

determine whether the production line is really producing rulers that are 12 inches long or

not.

a) What is the null hypothesis?

b) What is the alternative hypothesis

c) Using whatever method you want, clearly run and summarize the result of the

hypothesis test. What does this mean in terms of the problem situation?

Getting confused on using the image uploaded and which to apply and how to test. Can you show me the math layout too. I know how to do part A & B, but if you don't mind i'd appreciate it

\f