Exam 6: Statistical Methods in Quality Management

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Probability is the likelihood that an outcome occurs.

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What is probability? What are its characteristics?

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Probability is the likelihood that an outcome occurs.
Suppose we label the n outcomes in a sample space as O1,O2,…,On,where Oi represents the ith outcome in the sample space.Let P(Oi)be the probability associated with the outcome Oi.Then:
•The probability associated with any outcome must be between 0 and 1,or
0P(Oi)1 0 \leq P\left(O_{i}\right) \leq 1
for each outcome Oi
•The sum of the probabilities over all possible outcomes must be 1.0,or
P(O1)+ P(O2)+ ...+ P(On)= 1

To improve the quality of the wave soldering process through design of experiments,_____ factors at _____ levels were selected for the experiment.?

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Which of the following constitutes an approach to reducing sampling error?

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Which of the following requires the opinion of an expert to determine the location and characteristics of a definable sample group?

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Using _____,it was observed that bath temperature,wave height,and omega had a significant effect on the soldering defects.?

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Given here are a set of sample data: 12.0,18.3,29.6,14.3,and 27.8.The sample standard deviation for this data is equal to _____.

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Why were additional experimental designs conducted to reduce soldering defects in the process?

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One of the major disadvantages of the Histogram tool is that the results are not dynamically linked to the data.

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How did fault-free mass production and the systems manufactured for the defense effort during World War II further the use of statistical methods?

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In general,an experiment with m factors at k levels would have km combinations.

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The times (in minutes)required by a sample of 15 students to complete a class assignment are given below:?45,42,56,54,40,37,39,45,49,43,45,50,49,55,48??Using Excel functions and calculate the mean,median,mode,range,sample variance,and sample standard deviation.

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A travel article researcher randomly sampled 250 adult residents of Illinois and asked each resident if he/she planned to vacation outside of Illinois this coming summer.Fifty-six of these adults responded that they plan to vacation outside of Illinois.What is the 95% confidence interval for the population proportion of adult residents of Illinois who plan to vacation outside of Illinois this coming summer?

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Calculating the average value of 5 sample measurements of a door width is an example of:

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Any sampling procedure can result in _____ types of errors.

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One of the most common types of experimental designs in which all combinations of levels of each factor are considered is called a(n)_____ experiment.

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? The manufacture of discrete parts often calls for the use of different statistical tools from those used in the processing industries.Which of the following designed experiments on computer models would NOTbe required? ? ?

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A manager was assigned the task of investigating the error in payments for routine purchases made by the purchasing department.The manager randomly selected 12 payments,investigated them thoroughly,and determined the payment error for each of these payments.The payment error was defined as the difference between the amount paid and what should have been paid.The payment errors determined for these selected payments were as follows: A manager was assigned the task of investigating the error in payments for routine purchases made by the purchasing department.The manager randomly selected 12 payments,investigated them thoroughly,and determined the payment error for each of these payments.The payment error was defined as the difference between the amount paid and what should have been paid.The payment errors determined for these selected payments were as follows:     a.What is the 95% confidence interval for the population mean payment error? b.Suppose a recent company report inferred that the mean payment error may be running as high as $25.That led the manager to test the null hypothesis that the population mean payment error is equal to $25 versus the alternative that the population mean payment error is not equal to $25.Using a level of significance equal to 0.01,perform this hypothesis test. c.Suppose another manager used this same data to test the null hypothesis that the population mean payment error is less than or equal to $15 versus the alternative that the population mean payment error is greater than $15.What is the test statistic for this hypothesis testing situation? What is the critical value at a level of significance equal to 0.01? What is the conclusion? a.What is the 95% confidence interval for the population mean payment error? b.Suppose a recent company report inferred that the mean payment error may be running as high as $25.That led the manager to test the null hypothesis that the population mean payment error is equal to $25 versus the alternative that the population mean payment error is not equal to $25.Using a level of significance equal to 0.01,perform this hypothesis test. c.Suppose another manager used this same data to test the null hypothesis that the population mean payment error is less than or equal to $15 versus the alternative that the population mean payment error is greater than $15.What is the test statistic for this hypothesis testing situation? What is the critical value at a level of significance equal to 0.01? What is the conclusion?

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What are the typical soldering defects in a wave soldering process of a PCA-Encoder?

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In hypothesis testing,the null hypothesis,H0,is assumed to be false in the absence of contradictory data.

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