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Comparisonwise error rate b tukey simultaneous error

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Unformatted text preview: her or not to reject the null hypothesis due to insufficient information. 1-943 Chapter 01 - An Introduction to Business Statistics 44. The Excel/Mega-Stat output given above summarizes the results of a one-way analysis of variance in an attempt to compare the performance characteristics of four brands of vacuum cleaners. The response variable is the amount of time it takes to clean a specific size room with a specific amount of dirt. At a significance level of .05, the null hypothesis for the ANOVA F test is rejected. Analysis of the Tukey's simultaneous confidence intervals shows that at the significance level (experimentwise) of .05 we would conclude that A. all four brands of vacuum cleaners differ from each other in terms of their performance. B. brand 1 differs from brand 2, and brand 2 differs from brand 3 while the rest of the vacuum cleaner pairs do not differ from each other in terms of their performance. C. brand 1 differs from brand 2, and brand 3 differs from brands 1, 2 and 4, while the rest of the vacuum cleaner pairs do not differ from each other in terms of their performance. D. only brand 3 differs from the other three brands (brands 1,2 and 3), while the rest of the vacuum cleaner pairs do not differ from each other in terms of their performance. E. none of the four brands of vacuum cleaners differ from each other in terms of their performance. 1-944 Chapter 01 - An Introduction to Business Statistics 45. The Excel/Mega-Stat output given above summarizes the results of a one-way analysis of variance in an attempt to compare the performance characteristics of four brands of vacuum cleaners. The response variable is the amount of time it takes to clean a specific size room with a specific amount of dirt. What is the total number of observations for all brands of vacuum cleaners (total sample size)? A. 14 B. 17 C. 18 D. 19 E. 20 1-945 Chapter 01 - An Introduction to Business Statistics 46. The Excel/Mega-Stat output given above summarizes the results of a one-way analysis of variance in an attempt to compare the performance characteristics of four brands of vacuum cleaners. The response variable is the amount of time it takes to clean a specific size room with a specific amount of dirt. Use the information above and determine an individual 95% confidence interval for . The mean and sample sizes for brand 1 and brand 2 are as follows: n1 = 4 and n2 = 5. A. .2013 to 1.1387 B. .2852 to 1.0547 C. -.228 to 1.5680 D. .4515 to .8885 E. It cannot be determined with the information given. 1 = 2.95, 2 = 2.28, 47. Looking at four different diets, a researcher randomly assigned 20 equally overweight women into each of the four diets. What are the degrees of freedom for the treatments? A. 20 B. 4 C. 3 D. 19 E. 16 1-946 Chapter 01 - An Introduction to Business Statistics 48. Looking at four different diets, a researcher randomly assigned 20 equally overweight women into each of the four diets. What are the degrees of freedom for the error? A. 20 B. 4 C. 3 D. 19 E. 16 49. Looking at four different diets, a researcher randomly assigned 20 equally overweight women into each of the four diets. What are the degrees of freedom total? A. 20 B. 4 C. 3 D. 19 E. 16 50. Looking at four different diets, a researcher randomly assigned 20 equally overweight women into each of the four diets. What are the degrees of freedom for the confidence intervals? A. 20 B. 4 C. 3 D. 19 E. 16 51. _____ simultaneous confidence intervals test all of the pairwise differences between means respectively while controlling the overall Type I error. A. Randomized B. Tukey's C. Covariate D. Interacting 1-947 Chapter 01 - An Introduction to Business Statistics 52. _____ refers to applying a treatment to more than one experimental unit. A. Randomization B. Balanced experiment C. One-way ANOVA D. Replication 53. The F-test for testing the difference between means is equal to ratio of Mean Square _____________ over Mean Square __________________. A. Treatment, Error B. Error, Treatment C. Treatment, Total D. Error, Total 54. A _____ design, is an experimental design that compares "v" treatments by using "d" blocks, where each block is used exactly once to measure the effect of each treatment. A. One-way ANOVA B. Two-way ANOVA C. Randomized block D. Balanced complete factorial 55. In one-way ANOVA, the total sum of squares equal to _______________________. A. Treatment SS plus Error SS B. Treatment SS minus Error SS C. Treatment SS * Error SS D. Treatment SS/Error SS 56. In a ___________________ experimental design, independent random samples of experimental units are assigned to the treatments. A. One-way ANOVA B. Two-way ANOVA C. Randomized block D. Balanced complete factorial 1-948 Chapter 01 - An Introduction to Business Statistics 57. The dependent variable, the variable of interest in an experiment, is also called ___________ variable. A. Categorical B. Regression C. Response D. Factor 58. In performing a one-way ANOVA _________ measures the variability of the observ...
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