Question: Use Minitab to construct side-by-side boxplots for the yarnstrength.txt data . This can be accomplished by placing all the yarn-strength values in one column, with a second column providing numeric codes (1, 2, 3) to specify the draw ratio treatment group. Then, in the boxplot dialog box, specify the grouping variable name in the appropriate place (you may have to experiment a bit). Label your plot well (e.g. don’t use 1, 2, 3 for the draw ratio trt labels).

Yarnstrength.txt

Three treatments on yarn, with corresponding

yarn strengths Y (pounds). time order unavailable.

TRT 1 corresponds to the

currently-used setting for Draw Ratio (a control

variable). TRT2 has a 5% increase, and TRT 3 a

10% increase, in DR.

TRT Y

1 19.56

1 23.71

1 17.70

1 18.75

1 16.28

1 19.89

1 20.46

1 15.33

1 19.23

1 16.65

1 21.95

1 15.78

2 23.16

2 22.94

2 22.32

2 23.24

2 22.29

2 20.42

2 19.28

2 23.02

2 24.41

2 22.69

2 18.96

2 24.65

3 29.72

3 27.51

3 25.06

3 23.54

3 28.09

3 18.53

3 23.98

3 24.97

3 22.44

3 24.94

3 24.19

3 21.49

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