Exam 10: Experimental Design and Analysis of Variance

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A two-way ANOVA for a two-factor factorial design has 4 levels of factor 1, 3 levels of factor 2, and 5 observations per cell. -In testing the significance of factor 1,the numerator and denominator degrees of freedom for the ANOVA F test are:

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If the total sum of squares in a one-way analysis of variance is 25 and the between-groups sum of squares is 17,then the error sum of squares is?

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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 degrees of freedom for error?

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What is the value of the F statistic for blocks? Test H0: there is no difference between block effects at a = 05

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A machine manufacturer conducted a study to compare the performance of two types of similar machines A and B in terms of the hardness of the product manufactured.According to the production supervisor,the machine setting (high,medium,low)also affects the hardness of the product.The hardness readings (response variable)are given in a two-factor factorial design format with two observations per cell. Machine type Machine Setting A B Low 8 4 8 4 Medium 7 5 6 2 High 9 4 10 5 You are also given the following additional information: SS (machine type)= 48,SS (machine setting)= 8,SST = 64 -Complete the analysis of variance table and test to determine whether the means for factor A differ at a = .10.Interpret the results.

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A machine manufacturer conducted a study to compare the performance of two types of similar machines A and B in terms of the hardness of the product manufactured.According to the production supervisor,the machine setting (high,medium,low)also affects the hardness of the product.The hardness readings (response variable)are given in a two-factor factorial design format with two observations per cell. Machine type Machine Setting A B Low 8 4 8 4 Medium 7 5 6 2 High 9 4 10 5 You are also given the following additional information: SS (machine type)= 48,SS (machine setting)= 8,SST = 64 -Complete the analysis of variance table and test to determine whether there is significant interaction between factor A and factor B at a = .10.Interpret the results.

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In a one-way ANOVA for a completely randomized design, qαq _ { \alpha } is always less than tα/2t _ { \alpha / 2 } .

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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 groups (treatment)?

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In a completely randomized design,different levels of the factor are called _____.

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In a one-way ANOVA for a completely randomized design with 4 groups and 15 observations per each group,the between-groups degrees of freedom is:

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The between-groups degrees of freedom for a randomized block design ANOVA test with 4 treatment groups and 5 blocks is:

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A machine manufacturer conducted a study to compare the performance of two types of similar machines A and B in terms of the hardness of the product manufactured.According to the production supervisor,the machine setting (high,medium,low)also affects the hardness of the product.The hardness readings (response variable)are given in a two-factor factorial design format with two observations per cell. Machine type Machine Setting A B Low 8 4 8 4 Medium 7 5 6 2 High 9 4 10 5 You are also given the following additional information: SS (machine type)= 48,SS (machine setting)= 8,SST = 64 -Complete the following ANOVA Table and determine the value of the F statistic Source SS d.f. MS F Treatment 583.39 Error Total 1555.57

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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 -Test H0: There is no difference between blocks at a=.05.

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If a researcher cannot control the factor being studied,then the researcher is carrying out a designed experiment.

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Consider a two-factor factorial experiment with 4 levels of factor 1,5 levels of factor 2,and 3 observations per cell.If we use a two-way ANOVA to analyze the data from this experiment,the interaction degrees of freedom is:

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In performing a one-way ANOVA for a completely randomized design,the between-groups sum of squares equals:

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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 for the treatments?

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In performing an ANOVA for a randomized block design,the between-groups sum of squares equals:

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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 degrees of freedom for blocks?

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_____ refers to applying an IV to more than one experimental unit.

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