You want to see if the new process to label boxes works. The process standard deviation is 0.25 hours, and the normal standard deviation is 2. The data from that activity appears below.

Operator Hour 1 Hour 2 Hour 3 Hour 4

Jack 46 50 49 51

Jill 47 48 47 50

John 50 50 47 45

Georgina 48 49 49 47

Geoff 49 50 46 45

i.Calculate all sample means, and the mean of all sample means

ii.Calculate upper and lower control limits.

iii. Is this process in or out of control?