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# A certain type of integrated circuit is connected to its ISBN: 9780073401331 38

## Solution for problem 10E Chapter 10.2

Statistics for Engineers and Scientists | 4th Edition

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Problem 10E

Problem 10E

A certain type of integrated circuit is connected to its frame by five wires. Thirty samples of five units each were taken, and the pull strength (in grams) of one wire on each unit was measured. The data are presented in Table E10 on page 783. The means are = 9.81, = 1.14, and = 0.4647.

a. Compute the 3σ limits for the R chart. Is the vari­ance out of control at any point? If so, delete the samples that are out of control and recompute and .

b. Compute the 3σ limits for the chart. On the basis of the 3σ limits, is the process mean in control? If not, at what point is it first detected to be out of control?

c. On the basis of the Western Electric rules, is the process mean in control? If not, when is it first detected to be out of control?

Step-by-Step Solution:
Step 1 of 3

Calculus I Chapter 2 –Section 2 - Intro to Limits and Properties Review Remember: A limit is not at a number but it is very, very close to that number Therefore, a lim = → Let us start out simple concerning limits, every aspect of math has its starting point. You may be startled when you see the limit symbol in front of the f(x) – function, but don’t worry, think of it has just an f(x) you are evaluating. For Example, in these two equations I going to show you example of the simple limits below: Ex.1: lim 5 + 9 = →2 (Note: It’s not rocket science. There are simply asking for you to plug in the number, 2 into the function to find out the limit as x goes to 2. Also note that the limit symbol goes way when you reach the step of evalua

Step 2 of 3

Step 3 of 3

##### ISBN: 9780073401331

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A certain type of integrated circuit is connected to its