Process Improvement Plan Sitaniel Johnson Operations Management June 13, 2010 Jose Rodrigo Pons Total Quality Management is composed of Employee Involvement, Customer Satisfaction, and Continuous Improvement in Performance
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larger the curve looks increasingly like a normal curve. Same for t-distribution D.F = n-1 Ho: σ2= σo2 Ha: σ 2 ≠ σ02 Ha: σ 2 > σ02 Ha: σ 2 < σ02 Χ2 = [ ( n - 1 ) * s2 ] / σ2 Confidence interval for σ2 : Confidence interval for σ2 : D.F. = n-1 D.F. = n-1 Note: sometimes L = & u = Note: s= standard deviation X^2 Tests: X^2 test for dependence using a contingency table: x^2 test can be used to test dependence
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16 df -2.7050 difference (Prada - Oracle) 0.7196 standard error of difference 0 hypothesized difference -3.76 t .0017 p-value (two-tailed) -4.2304 confidence interval 95.% lower -1.1796 confidence interval 95.% upper 1.5254 margin of error 2. The Willow Run Outlet Mall has two Haggar Outlet Stores, one located on Peach Street and the other on Plum Street. The two stores are laid out differently, but
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2009, the standard deviation is the difference between the entry data and the entry mean. Sample standard deviation x=√(∑(x-µ)^2 )/(N-1) = √8.783/(30-1) = √0.302862 = 0.5503 Construct a 95% Confidence Interval for the ounces in the bottles. According to research from the internet, Confidence interval is a term used in inferential
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the Excel file “QBA Stats 4.xls” available on the course website. (a) Estimate the 95% confidence interval for the slope coefficient β. (This can be obtained directly by using the Excel Analysis ToolPak.) (b) Estimate the 99% confidence interval for the slope coefficient β. (The necessary statistics (critical t-value and standard error) can be computed with Excel, but you need to apply the formula for the confidence interval.) Problem 3. In another data set of hockey players in the NHL, you should have
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562 | | | 95% Confidence Interval for Mean | Lower Bound | 11.86 | | | | | Upper Bound | 20.54 | | | | 5% Trimmed Mean | 16.17 | | | | Median | 16.00 | | | | Variance | 12.200 | | | | Std. Deviation | 3.493 | | | | Minimum | 12 | | | | Maximum | 21 | | | | Range | 9 | | | | Interquartile Range | 7 | | | | Skewness | .310 | .913 | | | Kurtosis | -.644 | 2.000 | | B | Mean | 12.40 | 1.435 | | | 95% Confidence Interval for Mean | Lower
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between two percentages or their ratio? If their ratio, which percentage goes in the numerator and which goes in the denominator? Does it matter? What do we mean by something being statistically significant at the 5% level? What is a 95% confidence interval? Those questions, and much more, are what this book is all about. In his fine article regarding nominal and ordinal bivariate statistics, Buchanan (1974) provided several criteria for a good statistic, and concluded: “The percentage is the
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in them. During the course of my investigation I will calculate several different things. I will calculate the mean, median, and standard deviation for the random bottles of sodas that were picked to checked. I will then construct a 95% Confidence Interval for the ounces in the bottles. I will conduct a hypothesis test to verify my claim that each bottle contains less than the 16 ounces. Finally I will discussion my conclusion on my random test of these bottles. Calculations The most common
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ownership | N | Mean | Std. Deviation | Std. Error Mean | | 1 | 18 | .050343 | .1305157 | .0307629 | | 2 | 10 | .147825 | .4362644 | .1379589 | Descriptives | | | | | | | | | | N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | Minimum | Maximum | | | | | | Lower Bound | Upper Bound | | | 1 | 18 | .050343 | .1305157 | .0307629 | -.014561 | .115247 | .0056 | .5627 | 2 | 10 | .147825 | .4362644 | .1379589 | -.164259 | .459910 | .0052 | 1.3894
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answer under (a), and considering the mode, describe the shape of the distribution of these data. (5 marks) The sample standard deviation is (approximately) 3.33. c. Give the 95% confidence interval for the number of food products that these twelve individual customers bought. (5 marks) d. What does this confidence interval tell us about the average number of food products bought within the overall customer population at this particular WeightRose store? (5 marks) You would like to draw a random sample
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