PSYC 515 Research Methods & Statistics II Week 2 - Quiz - ANOVA Concepts.
PSYC 515 Research Methods & Statistics II Week 2 - Quiz - ANOVA Concepts. Quiz: ANOVA Concepts LATEST Attempt 1 42 minutes 50 out of 50 Score for this quiz: 50 out of 50 Submitted Jul 5 at 4:43am This attempt took 42 minutes. Question 1 I have read and understand the Academic Honor policy as outlined in the Online Honor Code for Liberty University Online. I agree to abide by this policy and that the work submitted herein is my own. Yes No Question 2 2 / 2 pts Scenario: Does emotional intelligence change across the lifespan? A researcher conducts a longitudinal study by collecting data on the same people across 20 years. Emotional intelligence was quantified at ages 4, 14, 24, and 34 years of age. Emotional intelligence was quantified using the selfreport Bar-On EQ-I, which ranges from 0 — 110, and is considered "scale" in nature. Assume data meets all assumptions for a parametric test. Question: What is the dependent variable in this scenario? Four-year old children Age Emotional intelligence Biological sex Question 3 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report they do not regularly consume caffeine. The researcher randomly assigned the participants to one of three conditions (none, moderate, or high caffeine) before completing a memory task. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the dependent variable in this scenario? Caffeine Memory People who do not consume caffeine regularly Anxiety Question 4 2 / 2 pts Scenario: An HR manager wants to know if there is a difference between sexes (males and females) on number of years employed at his firm. Assume the data meets assumptions for a parametric test. Question: Which of the following best describes the scenario? Between-subjects Within-subjects Mixed design Question 5 2 / 2 pts Scenario: An I/O researcher wants to know if there is a difference among management types (authoritative, persuasive, or paternalistic) on average length of time employees stay with a company (measured in years). He collects this information from 100 companies. Assume the data meets assumptions for a parametric test. Question: Which of the following best describes the scenario? Between-subjects Within-subjects Mixed design Question 6 2 / 2 pts Scenario: Does emotional intelligence vary based on the type of preschool a child attends? A researcher collects data on 300 four-year-olds who attend different local types of preschools. The researcher was able to collect data from four different types of preschools - Montessori, Waldorf, Parent Co-ops, and religious preschools. Emotional intelligence was quantified using the selfreport Bar-On EQ-I, which ranges from 0 — 110, and is considered "scale" in nature. Assume data meets all assumptions for a parametric test. Question: What is the dependent variable in this scenario? Four-year old children Type of preschool Emotional intelligence Biological sex Question 7 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report they do not regularly consume caffeine. The researcher randomly assigned the participants to one of three conditions (none, moderate, or high caffeine) before completing a memory task. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the most appropriate statistical test to conduct given this scenario? Independent samples t-test Correlated groups t-test Randomized ANOVA Repeated measures ANOVA Question 8 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report not regularly consuming caffeine. The researcher has those 30 participants complete a memory task on three separate days (counterbalanced among participants). All participants complete the memory task after having none, moderate, and high levels of caffeine. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the research / alternate hypothesis for this scenario? Caffeine does not affect performance on a memory task. Caffeine affects performance on a memory task. People who regularly consume caffeine perform better on a memory task than those who do not regularly consume caffeine. People who regularly consume caffeine perform worse on a memory task than those who do not regularly consume caffeine. Question 9 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report not regularly consuming caffeine. The researcher has those 30 participants complete a memory task on three separate days (counterbalanced among participants). All participants complete the memory task after having none, moderate, and high levels of caffeine. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: Which of the following best describes the research design? Descriptive Predictive Quasi-experimental Experimental Question 10 2 / 2 pts Scenario: An HR manager wants to know if there is a difference between sexes (males and females) on number of years employed at his firm. Assume the data meets assumptions for a parametric test. Question: As taught in 510/515, what is the most appropriate graph to illustrate this scenario? Scatterplot Clustered bar graph Bar graph Box plot Question 11 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report they do not regularly consume caffeine. The researcher randomly assigned the participants to one of three conditions (none, moderate, or high caffeine) before completing a memory task. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the research / alternate hypothesis for this scenario? Caffeine does not affect performance on a memory task. Caffeine affects performance on a memory task. People who regularly consume caffeine perform better on a memory task than those who do not regularly consume caffeine. People who regularly consume caffeine perform worse on a memory task than those who do not regularly consume caffeine. Question 12 2 / 2 pts Scenario: Does emotional intelligence change across the lifespan? A researcher conducts a longitudinal study by collecting data on the same people across 20 years. Emotional intelligence was quantified at ages 4, 14, 24, and 34 years of age. Emotional intelligence was quantified using the selfreport Bar-On EQ-I, which ranges from 0 — 110, and is considered "scale" in nature. Assume data meets all assumptions for a parametric test. Question: What is the null hypothesis for this scenario? Emotional intelligence does not vary across the ages of 4 — 34. Emotional intelligence varies across the ages of 4 — 34. Emotional intelligence varies based on biological sex. Emotional intelligence does not vary based on biological sex. Question 13 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report not regularly consuming caffeine. The researcher has those 30 participants complete a memory task on three separate days (counterbalanced among participants). All participants complete the memory task after having none, moderate, and high levels of caffeine. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the most appropriate statistical test to conduct given this scenario? Independent samples t-test Correlated groups t-test Randomized ANOVA Repeated measures ANOVA Question 14 2 / 2 pts Scenario: Does amount of caffeine affect memory? This study was conducted using 30 participants who report they do not regularly consume caffeine. The researcher randomly assigned the participants to one of three conditions (none, moderate, or high caffeine) before completing a memory task. The memory task was quantified as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the independent variable in this scenario? Caffeine Memory People who do not consume caffeine regularly Anxiety Question 15 2 / 2 pts Scenario: If 20 participants completed an attention task twice — once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which test would be most appropriate? Assume data meets all assumptions for a parametric test, and that participant exposure to the sugar pill vs. nicotine pill were counterbalanced. Question: What is the scale of measurement of the dependent variable in this scenario? Nominal Ordinal Scale Question 16 2 / 2 pts Scenario: If 20 participants completed an attention task twice — once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which test would be most appropriate? Assume data meets all assumptions for a parametric test, and that participant exposure to the sugar pill vs. nicotine pill were counterbalanced. Question: Which of the following best describes the scenario? Within-subjects Mixed design Between-subjects Question 17 2 / 2 pts If 30 participants each completed a memory task three times — once each after having no, moderate, or high levels of caffeine, calculate the degrees of freedom for between groups. 29 28 56 2 Question 18 2 / 2 pts Within subjects designs are more powerful than between subjects designs because: individual differences are reduced or absent systematic variance is reduced error variance is increased none of these statements are true Question 19 2 / 2 pts If 30 participants each completed a memory task three times — once each after having no, moderate, or high levels of caffeine, calculate the total degrees of freedom. 29 28 56 2 Question 20 2 / 2 pts Which of the following is NOT an assumption of the one-way randomized ANOVA? The data are interval or ratio. The underlying distribution is skewed. The variance among the populations being compared are homogeneous. All of the alternative are correct. Question 21 2 / 2 pts If, in a randomized ANOVA, there are three groups with 10 participants in each group, the df for the Fratio is: 30. 29. 2, 27. 2, 28. Question 22 2 / 2 pts If a randomized ANOVA produced MSbetween = 35 and MSwithin = 15, then the F-ratio would be 35/15 = 2.33. 15/35 = 0.43. 35/50 = 0.70. 50/15 = 3.33. Question 23 2 / 2 pts Whenever the F-ratio is near 1.00 it means that a mistake has been made in the computation. there are large systematic effects present. the experimental manipulation probably had the predicted effects. the between-groups variation is no larger than would be expected by chance alone and no larger than the within-groups variance. Question 24 2 / 2 pts The null hypothesis for a two-tailed one-way randomized ANOVA states H0: m1 = m2 = m3. H0: m1 m2 m3. Ha: m1 = m2 = m3. Ha: m1 m2 m3. Question 25 2 / 2 pts If between-groups variance is small, then we have not observed experimenter effects. an effect of the dependent variable. enough samples. an effect of the independent variable. Question 26 2 / 2 pts Post hoc tests are used to determine whether an F-ratio is significant. determine whether groups are correlated. make all pairwise comparisons to find which conditions / groups differ. all of the options are correct Quiz Score: 50 out of 50
École, étude et sujet
Infos sur le Document
- Publié le
- 28 août 2023
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- 2023/2024
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psyc 515 research methods statistics ii
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psyc 515 research methods statistics ii wk 2
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wk 2 quiz anova concepts
