Exam 12: Experimental Design and Analysis of Variance
Exam 11: Statistical Inferences for Population Variances43 Questions
Exam 12: Experimental Design and Analysis of Variance114 Questions
Exam 13: Chi-Square Tests120 Questions
Exam 14: Simple Linear Regression Analysis147 Questions
Exam 15: Multiple Regression and Model Building154 Questions
Exam 16: Time Series Forecasting and Index Numbers157 Questions
Exam 17: Process Improvement Using Control Charts115 Questions
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A researcher has used a one-way analysis of variance model to test whether the average starting salaries differ among recent graduates from the nursing,engineering,business,and education disciplines.She has randomly selected four graduates from each of the four areas.
If MSE = 4,and SSTO = 120,complete the following ANOVA table and determine the value of the F statistic.
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When using a randomized block design,the interaction effect between the block and treatment factors cannot be separated from the error term.
(True/False)
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The F test for testing the difference between means is equal to the ratio of Mean Square _____________ over Mean Square __________________.
(Multiple Choice)
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Consider the following partial analysis of variance table from a randomized block design with 6 blocks and 4 treatments.
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A company that fills gallon containers of water has four machines.The quality control manager needs to determine whether the average fill for these machines is the same.Looking at 19 one-gallon containers,we have the following data of fill measures (x)in quarts:
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Consider the following partial analysis of variance table from a randomized block design with 6 blocks and 4 treatments.
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A vitamin-water manufacturer wants to compare the effects on sales of three water colors: green,blue,and red.Four regions are selected for the test,with the following ANOVA results.
(Essay)
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When computing individual confidence intervals using the t statistic,for all possible pairwise comparison of means,the experimentwise error rate will be:
(Multiple Choice)
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In one-way ANOVA,the total sum of squares is equal to _______________________.
(Multiple Choice)
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Consider a two-way analysis of variance experiment with treatment factors A and B.The results are summarized below.
Source of Variation df SS Factor A 4 86 Factor B 5 75 Interaction 20 75 Error 90 300 Total 119 536
(Essay)
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Consider a two-way analysis of variance experiment with treatment factors A and B,with factor A having four levels and factor B having three levels.The results are summarized below.
(Essay)
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The experimentwise α for the 95 percent individual confidence interval for μ1 - μ2 (treatment mean 1 - treatment mean 2)will always be smaller than the experimentwise α for Tukey's 95 percent simultaneous confidence interval for μ1 - μ2.
(True/False)
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A sum of squares that measures the total amount of variability in the observed values of the response variable is referred to as the:
(Multiple Choice)
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Consider a two-way analysis of variance experiment with treatment factors A and B.
[23.31,26.89]B.The results are summarized below:
Source of Variation df SS Factor A 4 86 Factor B 5 75 Interaction 20 75 Error 90 300 Total 119 536 Find an individual 95 percent confidence interval of the mean response of 25.1 obtained when using level 1 of factor A and level 2 of factor
(Essay)
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When using a completely randomized design (one-way analysis of variance),the calculated F statistic will decrease as:
(Multiple Choice)
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A company that fills gallon containers of water has four machines.The quality control manager needs to determine whether the average fill for these machines is the same.Looking at 19 one-gallon containers,we have the following data of fill measures (x)in quarts.
(Essay)
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Consider a two-way analysis of variance experiment with treatment factors A and B,with factor A having four levels and factor B having three levels.The results are summarized below.
Source of Variation df SS Factor A 71 Factor B 63 Interaction 50 Error 280 Total 71 464
Calculate the degrees of freedom for factor A and factor B.
(Essay)
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In a 2-way ANOVA,treatment is considered to be a combination of a level of factor 1 and a level of factor 2.
(True/False)
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Consider the following calculations for a one-way analysis of variance from a completely randomized design with 20 total observations.
MSE = 101.25
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