Jump to level 1 A factory that manufactures screws is performing a quality control experiment. Each object should have a length of 20 centimeters. The factory believes that the length of the screws exceeds this value and measures the length of 59 screws. The sample mean screw length was 20.01 centimeters. The population standard deviation is known to be o = 0.11 centimeters What is the null hypothesis? |Select v What is the alternative hypothesis? |Select v 1 Check