Machines A and B have been showing disparate efficiency and defects per unit rate despite similar variation in quality at purchase time. If the mean squares between the 2 machines is 250 and the mean square from each machine 100, what is the value of...
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OPTIONS Multiple regression ANOVA Paired-difference testS Z-test ANSWER ANOVA EXPLANATION ANOVA is a statistical test that evaluates the difference among means of three or more samples. In this example , each of the eight tyres could be tested and the average expected mileage is recorded....
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OPTIONS Non-response error Confidence interval Lazy consumer error Mailing error ANSWER Non-response error EXPLANATION Since 94% of the customers have not responded to the surveys, it is termed as non-response error.
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OPTIONS 1.33 standard deviation 1.67 standard deviation 1.96 standard deviation 2.67 standard deviation ANSWER 1.33 standard deviation EXPLANATION The interquartile range of a normal distribution is 1.33 standard deviations.
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OPTIONS Sigma Standard deviation Sum of squares Sum of rectangles ANSWER Standard deviation EXPLANATION In standard deviation calculations, “s” stands for standard deviation.
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OPTIONS F-test Tukey Kramer Levene test for homogeneity of variance Tukey multiple comparison ANSWER Tukey multiple comparison EXPLANATION Tukey Multiple Comparison is not a one-way analysis of variance.
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OPTIONS Only blind attendants are used. Special types of blinds are used. Samples are kept confidential from customers. Samples are kept confidential from testers. ANSWER Samples are kept confidential from testers. EXPLANATION Double blind experimental design means that the samples are kept confidential from testers.
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OPTIONS Capability-requirement analysis FMEA analysis Capability-complexity analysis CandE analysis ANSWER Capability-complexity analysis EXPLANATION Capability-Complexity Analysis is used.
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OPTIONS 2.944 3.66 3.287 5 ANSWER 3.66 EXPLANATION This is a case of u-chart (count defects and sub-group size may not be constant) u-bar = 1.84 n = 5 UCL = u-bar + 3 * SQRT (u-bar/n) UCL = 1.84 + 3 * SQRT (1.84/5)...
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OPTIONS R-Chart C-Chart P-Chart Y-Chart ANSWER R-Chart EXPLANATION An R-Chart must have at least 20 subgroups of observed values to judge whether a process is in control or not.
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