Exam 6: Statistical Methods in Quality Management

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Based on historical data,the diameter of a ball bearing is normally distributed with a mean of 0.527 cm and a standard deviation of 0.008 cm.Suppose that a sample of 18 ball bearings is randomly selected from a very large lot.Determine the probability that the average diameter of a sampled ball bearing is greater than 0.530 cm.

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The probability density function for the normal distribution is, The probability density function for the normal distribution is,    The probability density function for the normal distribution is,

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_____ involve(s)drawing inferences about two contrasting propositions relating to the value of a population parameter,one of which is assumed to be true in the absence of contradictory data.

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The Data Validation Toolpak in Microsoft Excel for Windows provides many procedures for conducting statistical analyses.

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A _____ is a subset of objects taken from the _____.

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The square of the correlation coefficient is called the coefficient of determination.

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Suppose that a scatter diagram depicts a relationship between the two variables that can be summarized by a straight line.The correlation coefficient is computed and results in a value of -0.73.Which of the following is NOT TRUE?

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As the sample size increases,the standard error of the mean increases,all else being held constant.

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Many new industries-such as bioinformatics,medical imaging,and nanotechnology-are emerging as part of a long list of industries that employ statistics.What are some examples??

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Which of the following is NOT a tool for descriptive statistics?

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State the steps involved in a hypothesis test.

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What is a sampling distribution? State the sampling distributions of What is a sampling distribution? State the sampling distributions of   and p for finite populations. and p for finite populations.

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A perfume bottle is designed to have a capacity of 15 ounces.There is variation in the bottle manufacturing process.Based on historical data,let's suppose that the bottle capacity can be reasonably modeled by a normal distribution with a mean of 15 ounces and a standard deviation of 0.2 ounces.What proportion of these bottles will have a capacity between 14.7 and 15.1 ounces?

(Multiple Choice)
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What are the aspects of the wave soldering process that might affect the resulting quality of the PCA-Encoders??

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The variance is the simplest measure of dispersion and is computed as the difference between the maximum value and the minimum value in the data set.

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Briefly discuss the relation between exponential distribution and Poisson distribution with an example.

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Group width =

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Which of the following is NOT a type of sampling scheme?

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A _____ is a function that assigns a numerical value to every possible outcome in a sample space.

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The sampling method where every item in the population has an equal probability of being selected is called:

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