Question 35 4 pts A design engineer wants to construct a sample mean chart for controlling the service life of one of the types of light bulbs his company procuces, Its grow's from numeros previous samples that this service P'e is normally distributed with a mean of 500 hours and a standard deviation of 20 houn, On Hires recept production hatches, he tested service Ife on random samples of four bulbs, with these results SERVICE LTEJhearst 125 5115 $15 185 465 475 If he uses upper and lower control limits of 505 and 470 hours, on what samples) (if any] does service life appear to be out of control? O Sample 1 O Sample 2 O harpe: 153 The correct answer 's nat provided. D Question 36 3 pts