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13 Cards in this Set
- Front
- Back
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What are the six cause categories in a fishbone chart?
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Measurement, Materials, People, Environment, Methods, Machines
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What does OFAT stand for?
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One factor at a time
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What are the basic guidelines in designing an experiment?
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Problem statement, response variable, factors and levels, experimental design, perform the experiment, conclusions
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How are potential and other design factors grouped?
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Potential design factors, noise/nuisance factors, uncontrollable factors, held-constant factors.
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What is a fishbone chart?
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A method for matching causes with an effect (response variable)
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What is a pareto chart?
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It sorts values greatest to smallest to show dominate classifications of the data. The power law or 80/20 rule.
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What is a probability plot used for?
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Its a quick way to identify normality of data.
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What do we mean by univariate and bivariate data?
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Univariate data is uncorrelated, i.e. 1,2,3,4,5
Bivariate is pairs of values (x,y) |
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What is the central limit theorem?
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Sum of a large number of samples will tend toward normal distribution.
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In data regression what is meant by residual values?
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Residual values is the amount of error between each data point and the curve fit against it.
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What is the p-value used for?
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It is the chance of wrongly rejected the null hypothesis.
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When should you reject the null hypothesis?
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When the p-value is less than or equal to the significance level (alpha). For a 95% confidence interval, alpha is .05.
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How do you use the p-value to determine whether your probability plot is showing normal data?
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P-value is greater than your significance level. For 95% CI, greater than .05.
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