In a one way-ANOVA with F test, the F value tends to decrease when: SStotal increases...
In a one way-ANOVA with F test, the F value tends to decrease when:
-
SStotal increases
SStotal decreases
SSwithin increases
SSbetween increases
-
Tukey's honestly significant difference (HSD) test of post-hoc analysis should be used only if:
the omnibus null hypothesis in an AVOVA is retained.
the omnibus null hypothesis in an AVOVA is rejected.
the all the groups have the same sample size.
the distributions are skewed.
Homework Answers
Q1: Answer: SSwithin increases
--
Q2: Answer: the omnibus null hypothesis in an AVOVA is rejected.
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In a one way-ANOVA with F test, the F value tends to decrease
when:
SStotal increases...
In an analysis of variance ANOVA, a post-hoc HSD test is Select one: a. done when...
In an analysis of variance ANOVA, a post-hoc HSD test is Select one: a. done when the null hypothesis is rejected. b. done before the computed F is compared to the critical value of F. c. not done if all the means are similar except one. d. always done when there are four or more groups.
8. _____ can be interpreted as the proportion of variance in the dependent variable that is...
8. _____ can be interpreted as the proportion of variance in the dependent variable that is accounted for by the independent variable. MS R2 F d 9. By convention, an R2 value of 0.16 would be considered: too small to reject the null hypothesis. large. small. medium. 10. The Bonferroni test is: more conservative than the Tukey's HSD test. a post-hoc test. a planned comparison test. a post-hoc test and is more conservative than the Tukey's HSD test. 11. Calculation...
The One-way ANOVA F test statistic can be calculated using which formula? a. F = MSBetween...
The One-way ANOVA F test statistic can be calculated using which formula? a. F = MSBetween / MSTotal b. F = SSBetween / SSTotal c. F = MSBetween / MSWithin d. F = MSWithin / MSBetween
Which of the following statements about the one-way ANOVA are correct?
Which of the following statements about the one-way ANOVA are correct? (Select all that apply) The larger the variability within groups relative to the variability between groups, the larger the F test statistic tends to be. The results of the ANOVA F test does not tel us which groups are different or how different they are. An F-distribution is symmetrical about 0 and extends indefinitely in both directions In a one-way ANOVA, if the null hypothesis is rejected, we conclude that the population means...
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do...
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do you use a post-hoc test? Indicate when you use a Fisher's test vs. a Tukey's HSD. 3. A researcher was interested in examining the decision making processes of people who work different shifts in a factory. They ask the participants from each shift to answer a set of questions regarding how they would deal with potential issues in the factory. Below are the scores...
Find the critical F-value for a one-way ANOVA given: α = 0.01 dfb = 30 dfw...
Find the critical F-value for a one-way ANOVA given: α = 0.01 dfb = 30 dfw = 14 a. 2.72 b. 3.34 c. 4.21 d. 1.98 e. 3.00 In which direction is the F distribution skewed? a. Positively skewed b. Negatively skewed c. No skew If our calculated F is LARGER than our identified critical value from the F-table, what decision would we make about the null hypothesis? a. Reject the null hypothesis b. Fail to reject (i.e., retain) the...
a) Drop-down options: na, one-way ANOVA, within subjects ANOVA, or two-way ANOVA b) Drop-down options: Yes...
a) Drop-down options: na, one-way ANOVA, within subjects ANOVA,
or two-way ANOVA
b) Drop-down options: Yes or No
c) Drop-down options: na, Trivial Effect, Small Effect, Medium
Effect, Large Effect
e & f) Drop-down options: Yes or No
Application Exercise: A social psychologist is interested in how optimism is related to life satisfaction. A sample of individuals categorized as optimistic were asked about past, present, and projected future satisfaction with their lives. Higher scores on the life satisfaction measure indicate...
6 questions need to be answered. please answer all thank you!! 8. Tukey's HSD test A...
6 questions need to be answered. please answer all thank
you!!
8. Tukey's HSD test A Aa Sleep apnea is a disorder characterized by pauses in breathing during sleep. Children who suffer from untreated sleep apnea often have behavior problems, including hyperactivity, inattention, and aggression. A common treatment for pediatric sleep apnea is the surgical removal of enlarged tonsils and adenoids that are obstructing the airways. Suppose researchers at a sleep clinic are interested in the effect of surgical treatment...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 4 groups (J = 4), what would your adjusted alpha value be for the post-hoc tests? Remember, our alpha is 0.05 for the class. Round final answers to four decimal places. QUESTION 2 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 6 groups (J = 6), what would...
10. Tukey's HSD test Aa Aa Sleep apnea is a disorder characterized by pauses in breathing during ...
Please answer all parts
10. Tukey's HSD test Aa Aa Sleep apnea is a disorder characterized by pauses in breathing during sleep. Children who suffer from untreated sleep apnea often have behavior problems, including hyperactivity, inattention, and aggression. A common treatment for pediatric sleep apnea is the surgical removal of enlarged tonsils and adenoids that are obstructing the airways Suppose researchers at a sleep clinic are interested in the effect of surgical treatment for pediatric sleep apnea on aggressive behavior....
ANOVA Homework 1. How is an ANOVA different from a t-test? 2. When and why do you use a post-hoc test? Indicate when you use a Fisher's test vs. a Tukey's HSD. 3. A researcher was interested in examining the decision making processes of people who work different shifts in a factory. They ask the participants from each shift to answer a set of questions regarding how they would deal with potential issues in the factory. Below are the scores...
a) Drop-down options: na, one-way ANOVA, within subjects ANOVA,
or two-way ANOVA
b) Drop-down options: Yes or No
c) Drop-down options: na, Trivial Effect, Small Effect, Medium
Effect, Large Effect
e & f) Drop-down options: Yes or No
Application Exercise: A social psychologist is interested in how optimism is related to life satisfaction. A sample of individuals categorized as optimistic were asked about past, present, and projected future satisfaction with their lives. Higher scores on the life satisfaction measure indicate...
6 questions need to be answered. please answer all thank
you!!
8. Tukey's HSD test A Aa Sleep apnea is a disorder characterized by pauses in breathing during sleep. Children who suffer from untreated sleep apnea often have behavior problems, including hyperactivity, inattention, and aggression. A common treatment for pediatric sleep apnea is the surgical removal of enlarged tonsils and adenoids that are obstructing the airways. Suppose researchers at a sleep clinic are interested in the effect of surgical treatment...
QUESTION 1 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 4 groups (J = 4), what would your adjusted alpha value be for the post-hoc tests? Remember, our alpha is 0.05 for the class. Round final answers to four decimal places. QUESTION 2 After a one-way ANOVA test, you conduct all possible post-hoc pairwise comparisons using the Bonferroni correction. If there were 6 groups (J = 6), what would...
Please answer all parts
10. Tukey's HSD test Aa Aa Sleep apnea is a disorder characterized by pauses in breathing during sleep. Children who suffer from untreated sleep apnea often have behavior problems, including hyperactivity, inattention, and aggression. A common treatment for pediatric sleep apnea is the surgical removal of enlarged tonsils and adenoids that are obstructing the airways Suppose researchers at a sleep clinic are interested in the effect of surgical treatment for pediatric sleep apnea on aggressive behavior....
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