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| 1 | |
__________ involves deciding how to collect data in a way that allows us to most effectively compare population means. |
| | A) | Analysis of variance |
| | B) | Experimental design |
| | C) | Regression analysis |
| | D) | Analysis of covariance |
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| 2 | |
_________ sum of squares measures the variability of the observed values of the response variable around their respective treatment means. |
| | A) | Treatment |
| | B) | Error |
| | C) | Interaction |
| | D) | Total |
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| 3 | |
Variability of the sample treatment means is also called within-treatment variability. |
| | A) | True |
| | B) | False |
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| 4 | |
The advantage of the randomized block design over the completely randomized design is that we are comparing the treatments by using __________ experimental units. |
| | A) | randomly selected |
| | B) | the same |
| | C) | different |
| | D) | representative |
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| 5 | |
After rejecting the null hypothesis of equal treatments, a researcher decided to compute a 95 percent confidence interval for the difference between the mean of treatment 1 and mean of treatment 2 based on Tukey's procedure. At α = .05, if the confidence interval includes the value of zero, then we can reject the hypothesis that the two population means are equal. |
| | A) | True |
| | B) | False |
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| 6 | |
Different levels of a factor are called |
| | A) | treatments. |
| | B) | variables. |
| | C) | responses. |
| | D) | observations. |
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| 7 | |
In a one-way analysis of variance with three treatments, each with five measurements, in which a completely randomized design is used, what is the degrees of freedom for treatments? |
| | A) | 5 |
| | B) | 2 |
| | C) | 4 |
| | D) | 8 |
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| 8 | |
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Consider the one-way ANOVA table above. What is the mean square error? |
| | A) | 71.297 |
| | B) | .5604 |
| | C) | 1.297 |
| | D) | 213.8810 |
| | E) | 9.7 |
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| 9 | |
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Consider the above one-way ANOVA table. If there are an equal number of observations in each group, then each group (treatment level) consists of _______ observations. |
| | A) | 3 |
| | B) | 4 |
| | C) | 6 |
| | D) | 20 |
| | E) | 24 |
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| 10 | |
Which of the following is not an assumption for one-way analysis of variance? |
| | A) | Independence |
| | B) | Normality |
| | C) | Random design |
| | D) | Constant variance |
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| 11 | |
When we compute 100(1 - α) percent simultaneous confidence intervals, the value of α is called the |
| | A) | comparisonwise error rate. |
| | B) | Tukey simultaneous error rate. |
| | C) | experimentwise error rate. |
| | D) | pairwise error rate. |
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| 12 | |
When using completely randomized design (one-way) ANOVA, if the between-treatment variability is ______ compared to the within-treatment variability, the value of F will be ______. |
| | A) | small, large |
| | B) | large, small |
| | C) | large, large |
| | D) | equal to, large |
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| 13 | |
The treatment sum of squares measures the ______ variability. |
| | A) | between-treatment |
| | B) | residual |
| | C) | within-treatment |
| | D) | total |
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| 14 | |
A large value of F results when the treatment sum of squares is large compared to the error sum of squares. |
| | A) | True |
| | B) | False |
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| 15 | |
Pairwise comparison is made by comparing treatment means one at a time. |
| | A) | True |
| | B) | False |
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