HW Score: 25.69%. 6.47 of 25 points @ Points: 0.11 of 1 Question 3.10.1.1? Part 1 of 5 Homework: ch10 The standard deviation in the pressure required to open a certain valve is known to be 621.1 psi. Due to changes in the manufacturing process, the qualitycontrol manager feels that the pressure variability has been reduced. {a} State the null and alternative hypotheses in words. {bl State the null and alternative hypotheses symbolically. {cl Explain what it would mean to make a Type I error. {dl Explain what it would mean to make a Type II error. {a} State the null hypothesis in words. Choose the correct answer below. 0 A. The standard deviation in the pressure required to open any valve is 1.1 psi. 0 B. The standard deviation in the pressure required to open a certain valve is 1.1 psi. 0 C. The standard deviation in the pressure required to open a certain valve is different from 1.1 psi. 0 D. The standard deviation in the pressure required to open a certain valve is greater than 1.1 psi