Exam 10: Experimental Design and Analysis of Variance

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Suppose that you analyze data from a completely randomized experimental design using a one-way ANOVA.You find out later that the data was actually from a randomized block experimental design and use the ANOVA procedure to reanalyze the data.The F(groups)test statistic from your first analysis will be ______ the F(groups)test statistic from your second analysis.

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Block 1 2 3 4 5 Tr1 2 1 2 3 2 Tr2 4 4 1 1 2.5 TR3 3 4 3 2 3 Mean 2 3 3 2 overall mean =2.5 Consider the randomized block design with 4 blocks and 3 treatments (groups) given above -What is the total sum of squares?

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Consider the following data from a two-factor factorial experiment.You wish to perform a two-way analysis of variance to analyze the data. Factor I Factor II 1 2 3 1 4 8 5 6 7 5 5 5 6 2 4 5 0 2 3 1 3 2 1 -What is the interaction mean square?

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The error sum of squares measures the between-treatment variability.

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Find Tukey's simultaneous 95 percent confidence interval for the difference between the means of block 2 and block 4.

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In a two-factor factorial experiment,the interaction effect between two factors can only be measured if there are multiple observations in each cell (combination of levels of two factors).

(True/False)
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Suppose that you analyze data from a completely randomized experimental design using a one-way ANOVA.At the 5% level of significance,you reject the null hypothesis of equal treatment group means.You find out later that the data was actually from a randomized block experimental design and use the ANOVA procedure to reanalyze the data.For the randomized block design ANOVA,the null hypothesis of equal treatment group means will ______ be rejected at the 5% level of significance.

(Multiple Choice)
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Source d.f. Sum of Squares Model 3 213.88125 Error 20 11.208333 Total 23 225.0895 -Consider the above one-way ANOVA table.How many groups (treatment levels)are included in the study?

(Multiple Choice)
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Consider the following partial analysis of variance table from a randomized block design with 10 blocks and 6 groups (treatments). Source SS Treatments 2,477.53 Blocks 3,180.48 Error 11,661.38 Total -What is the calculated F statistic for blocks?

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Suppose that you analyze data from a completely randomized experimental design using a one-way ANOVA.You find out later that the data was actually from a randomized block experimental design and use the ANOVA procedure to reanalyze the data.The between-groups sum of squares from your first analysis will be ______ the between-groups sum of squares from your second analysis.

(Multiple Choice)
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In one-way ANOVA for a completely randomized design,the total sum of squares is equal to _______________________.

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Suppose that you analyze data from a completely randomized experimental design using a one-way ANOVA.You find out later that the data was actually from a randomized block experimental design and use the ANOVA procedure to reanalyze the data.The total sum of squares from your first analysis will be ______ the total sum of squares from your second analysis.

(Multiple Choice)
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Looking at four different diets, a researcher randomly assigned 20 equally overweight adults into each of the four diets. The researcher wishes to use a one-way ANOVA to analyze the data. -What is the degrees of freedom total?

(Multiple Choice)
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The partially completed ANOVA table for a two-factor factorial design is given below.Factor A and B have three and four levels,respectively.There are two observations in each cell (replications). Complete the Analysis of variance table and test to determine whether the means for factor A differ at a = .05.

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When we compute simultaneous 100 (1 - α\alpha )% confidence intervals,the value of a is called the

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Test H0: there is no difference between effects of levels of factor I at a =.05.

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Consider the following partial analysis of variance table from a randomized block design with 6 blocks and 4 groups (treatments). Source Sum of Squares Treatments 15.93 Blocks 42.09 Error 23.84 Total 81.86 -Calculate the degrees of freedom for blocks.

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Consider the following partial analysis of variance table from a randomized block design with 6 blocks and 4 groups (treatments). Source Sum of Squares Treatments 15.93 Blocks 42.09 Error 23.84 Total 81.86 -Determine the degrees of freedom for error.

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Consider the following one-way ANOVA table. Source d.f. Sum of Squares Model 3 213.88125 Error 20 11.208333 Total 23 225.0895 What is the value of the F statistic for testing for a difference between group means?

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Block 1 2 3 4 5 Tr1 2 1 2 3 2 Tr2 4 4 1 1 2.5 TR3 3 4 3 2 3 Mean 2 3 3 2 overall mean =2.5 Consider the randomized block design with 4 blocks and 3 treatments (groups) given above -What is the error sum of squares?

(Essay)
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