Discussion:
Q: A machine produces 3 inch nails. A sample of 10 nails was selected and the lengths determined:
2.89,2.95,3.00,3.05,2.99,2.96,3.10,3.06,3.00,3.12
Use the results to test Ho u=3 and Ha u not equal 3 at a=0.01. Give the computed test statistic and conclusion