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Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 10.2 - Problem 1e
Get Full Access to Statistics For Engineers And Scientists - 4 Edition - Chapter 10.2 - Problem 1e

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# The quality-control plan for a certain production pro­cess ISBN: 9780073401331 38

## Solution for problem 1E Chapter 10.2

Statistics for Engineers and Scientists | 4th Edition

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Problem 1E

The quality-control plan for a certain production process involves taking samples of size 4 . The results from the last 30 samples can be summarized as follows:

$$\sum_{i=1}^{30} \overline{X}_{i}=712.5$$   $$\sum_{i=1}^{30} R_{i}=143.7$$   $$\sum_{i=1}^{30} s_{i}=62.5$$

a. Compute the $$3\sigma$$ control limits for the chart.

b. Compute the $$3\sigma$$ control limits for the chart.

c. Using the sample ranges, compute the $$3\sigma$$ control limits for the $$\overline X$$ chart.

d. Using the sample standard deviations, compute the $$3\sigma$$ control limits for the $$\overline X$$ chart.

Equation Transcription:         Text Transcription:

sum_{i=1}^{30} overline{X}_{i}=712.5

sum_{i=1}^{30} R_{i}=143.7

sum_{i=1}^{30} s_{i}=62.5

3{sigma}

3{sigma}

3{sigma}

overline{X}

3{sigma}

overline{X}

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Leslie Ogu PSYC 2012 04/26/2016 ­ Stress and Health Pt. 1 and 2 Stress ➢ Def:​ negative feelings and beliefs that arise when people feel unable to cope with demands from their environment ➢ Perceived discrepancy between a person’s demands and his/her resources to cope with those demands ➢ Examples of Recent Stress ○ Had lots of tests ○ Lack of sleep ○ Had projects, research paper due ○ Having roommate or friend conflicts ○ Thoughts about the future ○ Lack of money ○ Working while in school ○ Illness (self or loved one) ➢ Types of Stressors ○ Distress v. Eustress ■ Distress ­​ harmful, threatening ● E.g., marital conflict ■ Eustress ­ ​ less harmful, challenging ● E.g., starting college ○ Acute v. Chronic ■ Acute ­ ​relatively sudden; short­lived ● E.g., tests, traffic ■ Chronic ­​ ongoing; persistent ● E.g., job loss, serious illness ○ Physical Stressors ■ E.g., heat/cold, infection ■ Direct physical threat to one’s well­being ○ Physiological Stressors ■ E.g., failure to reach an important goal ■ Challenges to one’s well­being ○ Both physical and physiological have similar effects on t

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##### ISBN: 9780073401331

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