11. You have been asked to determine whether the sound level at night is acceptable in cancer patient rooms. Using a digital sound-pressure-level meter, you collect data in 12 patient rooms, every day, for 20 days. Recommended sound levels are 35 dB ± 10 dB. Is the process in control? Why or why not? If the process mean and standard deviation are 40 dB and 3 dB, respectively, is the process capable of meeting recommended sound levels? Why or why not?