Why would you use ANOVA rather than multiple t tests for an experiment comparing more than two treatment conditions?
Why would you use ANOVA rather than multiple t tests for an experiment comparing more than...
Although t-tests can also be used to compare means, they are limited to comparing two at a time. Using multiple t-tests to compare experimental error, ultimately hindering the results. ANOVA provides a way to simultaneously compare multiple means, without the elevated experimental error. more than two means from the same set of data is possible, but it creates an increased risk of Comparing Multiple Groups For this discussion, begin by creating an example of a research situation that would involve...
Why do we use an ANOVA instead of doing multiple T-tests?
One-way ANOVA test and t-tests compare means. Which of the following should you consider to select the One-way ANOVA over multiple t-tests when you have more than two groups? A. Multiple t-Tests will increase the likelihood of a Type I Error. B. Multiple t-Tests will decrease the likelihood of saying something is significant when it is not. C. Multiple t-Tests will increase the likelihood of more accurate t-values. D. Multiple t-tests allow to run more tests and the more tests...
Homework8 Name and types DUE: April ANOVA theory 17, 2019 1) Why can we not do a series of t-tests when comparing more than two groups? 2) For an ANOVA, in English, what is the null hypothesis? The alternative? What would it mean to reject the null? How is this different than when we reject the null in a t test? 3) If I told you I ran a three-way MANCOVA, what could you tell me about my design and...
We cannot compute multiple t-tests without altering a if we have more than two groups because: Rol Select one: a. We would violate the homogeneity of variance assumption. b. a would increase based on the number of t-tests you would perform. c. We must determine if F is significant first. d. All of the above.
12. What is the average value expected for the independent-measures t statistic if the null hypothesis is true? a. O b. 1 C. 41 d. Mi-M2 13. For an ANOVA comparing three treatment conditions, what is stated by the alternative hypothesis (HA)? a. There are no differences between any of the population means b. At least one of the three populations means is different from another mean C. All three of the population means are different from each other d....
How many participants would be needed for a within-subjects experiment comparing four different treatment conditions with a total of 20 scores in each treatment? a. 40 b. 20 c. 80 d. Need more information to answer.
Discuss why ANOVA requires post-hoc analyses, while t tests do not, and describe under what conditions a post-hoc test must be performed.
1. The following data represent the results from an independent-measures experiment comparing three treatment conditions. Use an analysis of variance with α = .05 to determine whether these data are sufficient to conclude that there are significant differences between the treatments. You do not need to do post-hoc tests. Treatments 1 2 3 2 6 6 N = 12 4 6 10 G = 60 2 2 10 ∑X2 = 408 0 6 6 T = 8 T = 20 T = 32 SS = 8 SS = 12 SS = 16 2. A researcher reports an F-ratio with df =...
14. Why should you run a distillation of two liquid rather slowly than wo liquid rather slowly than more rapidly? 15. What would be the effect of lowering pressure on distillation?