An adhesives manufacturer periodically selects a sample of its product and glues 6 toothpicks together, in pairs. A measurement is then made of the number of pounds required to separate the toothpicks. The following data represent 15 samples, each consisting of 3 pairs of toothpicks, and the number of pounds required to separate each pair. Given these measurements, use one or more appropriate 3-sigma control charts in evaluating whether the process is in control.

Transcribed Image Text:

Pounds to Separate Pair Sample Number 2 22 28 28 30 29 2 32 31 30 29 4 30 32 30 33 28 28 6. 29 29 27 27 28 34 31 28 33 28 27 29 10 28 25 18 26 11 30 21 12 34 13 25 27 13 28 24 21 14 30 22 15 18 28 24 3.