## PSYC 515 Quiz ANOVA Concepts

**PSYC 515 Quiz: ANOVA Concepts**

- 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 quantied as number of items correctly recalled. Assume data meets all assumptions for a parametric test. Question: What is the independent variable in this scenario?
- 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 quantied at ages 4, 14, 24, and 34 years of age. Emotional intelligence was quantied using the self-report 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?
- 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 quantied using the self- report 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: As taught in 510/515, what is the most appropriate graph to illustrate this scenario?
- 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 quantied 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?
- 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 independent variable in this scenario?
- 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 quantied at ages 4, 14, 24, and 34 years of age. Emotional intelligence was quantied using the self-report 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 research / alternate hypothesis for this scenario?
- 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 quantied using the self- report 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 research / alternate hypothesis for this scenario?
- 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?
- 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: What is the null hypothesis for this scenario?
- Scenario: An HR manager wants to know if there is a difference between sexes (males and females) on number of years employed at his rm. Assume the data meets assumptions for a parametric test. Question: What is the null hypothesis for this scenario?
- Scenario: An HR manager wants to know if there is a difference between sexes (males and females) on number of years employed at his rm. Assume the data meets assumptions for a parametric test. Question: What is the dependent variable in this scenario?
- Scenario: An HR manager wants to know if there is a difference between sexes (males and females) on number of years employed at his rm. Assume the data meets assumptions for a parametric test. Question: What is the research / alternate hypothesis for this scenario?
- 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 quantied 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?
- 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 quantied at ages 4, 14, 24, and 34 years of age. Emotional intelligence was quantied using the self-report 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 most appropriate statistical test to conduct given this scenario?
- 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 quantied using the self- report 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?
- 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.
- 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.
- Conducting multiple independent samples t-tests as opposed to a single One-way ANOVA increases the chances of:
- If the independent variable in an experiment had an effect this would contribute to _____ variance in the
*F*-ratio. - Post hoc tests are used to
- The between-groups variance is comprised of _____ variance and _____ variance.
- The alternative hypothesis for a two-tailed one-way randomized ANOVA states
- The
*F*-ratio is a ratio of _____ variance over _____ variance. - When the variance _____ the groups is _____ and the variance _____ the groups is _____, we can expect a large
*F*-ratio. - Which of the following is not an assumption of the one-way repeated measures ANOVA?