Question: 1. Draw a histogram of these data. What can you conclude (if anything) about the distribution of the tread wear? 2. Construct x-bar and R

1. Draw a histogram of these data. What can you conclude (if anything) about the distribution of the tread wear?

2. Construct x-bar and R charts for these data. Is the production process in control?

3. Provide two examples of each of the four major categories of quality costs applicable to this situation (i.e., prevention, appraisal, internal and external failure costs).

4. What are the process capability indexes for this process to meet design specifications? What do you recommend?

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1 The distribution of the data is somewhat symmetrical but the 14 observations between 16 to 20 skew the tails of the distribution as well as the 6 observations between 40 to 44 Students should recogn... View full answer

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