Question 1 2 pts A part manufactured at a factory is known to be 12.05 cm long on average, with a standard deviation of 0.396. One day you suspect that that the part is coming out a little longer than usual, but with the same deviation. You sample 20 at random and find an average length of 12.12. What is the Z-score which would be used to test the hypothesis that the part is coming out longer than usual?