Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 5: Q10P (page 114)

How is a control chart used? State six indications that a process is going out of control.

Short Answer

Expert verified

Control charts are used as indicators whether the values being monitored are unnaturally far from the values being targeted. It uses the confidence intervals for a Gaussian distribution as its visual representation.

Step by step solution

01

Definition of control chart

A Control Chart is a visual representation of the confidence intervals for a Gaussian distribution.

The control chart notifies us when a property being examined strays dangerously far from an anticipated target value.

02

Six signs that a process might be getting out of control

Six signs that a process might be getting out of control are:

1. Keen observation outside the action lines.

2. There is always 2 out of 3 measurements between action and warning lines.

3. There are all 7 consecutive measurements above or below the centre line.

4. There are all 6 measurements which can be increasing or decreasing where they are located.

5. There are 14 points which are alternating up and down regardless where they are located.

6. A nonrandom pattern.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What is a blank and what is its purpose? Distinguish method blank, reagent blank, and field blank.

Olympic athletes are tested to see if they are using illegal performance-enhancing drugs. Suppose that urine samples are taken and analyzed and the rate of false positive results is 1 %. Suppose also that it is too expensive to refine the method to reduce the rate of false positive results. We do not want to accuse innocent people of using illegal drugs. What can you do to reduce the rate of false accusations even though the test always has a false positive rate of 1 %?

What are the three parts of quality assurance? What questions are asked in each part and what actions are taken in each part?

Let C stand for concentration. One definition of spike recovery is%recovery=Cspikedsample-CunspikedsampleCaded×100

An unknown was found to contain10.0μgof analyte per liter. A spike ofrole="math" localid="1654945506958" 5.0μg/Lwas added to a replicate portion of unknown. Analysis of the spiked sample gave a concentration of15.3μg/LFind the percent recovery of the spike.

1.00 mL of blood serum was diluted to 25.00 mL in each flask of a standard addition experiment like Figure 5-7 to measure a hormone with a molecular mass of 373 g/mol. The x-intercept of the graph was 4.2 ppb (parts per billion). Find the concentration of hormone in the serum and express your answer in ppb and molarity. Assume that the density of serum and all solutions is close to 1.00 g/mL
See all solutions

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Read Explanation

Making Measurements

Read Explanation

Chemistry Branches

Read Explanation

Organic Chemistry

Read Explanation

Chemical Analysis

Read Explanation

Kinetics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free