a) 0 b) 0.483 c) 1 d) 0.577

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: WEIGHT OF TOOTHPASTE 7 am 6.69 6. 68 6.79 6.77 6.74 6.76 10 am 6.71 6.72 6.71 6. 76 6.75 6.74 Time 1 pm 6.66 6. 68 6. 67 6.71 6. 76 6. 78 4 pm 6.73 6.74 6.72 6. 76 6. 78 6.75 7 pm 6.75 6.73 6.75 6. 77 6.79 6.75 What is the value of A2, the control limit factor for averages? Multiple Choice O