increase the Type 1 C) decrease the Type I and Type Il D) increase the Type I and Type II E) have little or no Impact USE THE FOLLOWING TO ANSWER QUESTIONS 11-15 A design engineer wants to construct a sample mean (X bar) chart for controlling the service life of a type of light bulb her company produces. She knows from numerous previous samples that service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, she tested service life on random samples of 4 bulbs with these results: Sample SERVICE LIFE 1 495 500 505 500 2 525 $1S SOS S15 3 470 480 460 470 11. What is the sample mean service life for sample 2? A) 460 hours B) 495 hours C) 500 hours D) 515 hours EJ 525 hours 12. What is the mean of the sampling distribution of sample means for whenever service life is in control? Al 250 hours B) 470 hours C 495 hours D) 500 hours E) 515 hours 13. What is the standard deviation of the sampling distribution of sampling means when service life is in control? Al 5 hours B) 6.67 hours CI 19 hours D) 11.55 hours E) 20 hours 14. If she uses upper and lower control limits of 520 and 480 hours, what is the probability of a Type I error (concluding service life is out of control when it is actually in control? A) 0.0026 B) 0.00456 C) 0.3174 D) 0.6826 E).9544 15. If she uses upper and lower control limits of 520 and 480 hours, on what sample(s) if any) does service appear to be out of control? A) sample 1 B) sample 2 C) sample 3 D) both samples 2 and 3 E) none increase the Type 1 C) decrease the Type I and Type Il D) increase the Type I and Type II E) have little or no Impact USE THE FOLLOWING TO ANSWER QUESTIONS 11-15 A design engineer wants to construct a sample mean (X bar) chart for controlling the service life of a type of light bulb her company produces. She knows from numerous previous samples that service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, she tested service life on random samples of 4 bulbs with these results: Sample SERVICE LIFE 1 495 500 505 500 2 525 $1S SOS S15 3 470 480 460 470 11. What is the sample mean service life for sample 2? A) 460 hours B) 495 hours C) 500 hours D) 515 hours EJ 525 hours 12. What is the mean of the sampling distribution of sample means for whenever service life is in control? Al 250 hours B) 470 hours C 495 hours D) 500 hours E) 515 hours 13. What is the standard deviation of the sampling distribution of sampling means when service life is in control? Al 5 hours B) 6.67 hours CI 19 hours D) 11.55 hours E) 20 hours 14. If she uses upper and lower control limits of 520 and 480 hours, what is the probability of a Type I error (concluding service life is out of control when it is actually in control? A) 0.0026 B) 0.00456 C) 0.3174 D) 0.6826 E).9544 15. If she uses upper and lower control limits of 520 and 480 hours, on what sample(s) if any) does service appear to be out of control? A) sample 1 B) sample 2 C) sample 3 D) both samples 2 and 3 E) none