PSYC515 QUIZ 2 - ANOVA CONCEPTS

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Liberty University *

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PSYC 515

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Statistics

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Feb 20, 2024

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Instructions The quiz:  Covers the Learn material from Module 2: Week 2 .  Contains 25 multiple-choice questions .  Is limited to 90 minutes .  Allows 1 attempt .  Is worth 50 points . This quiz is designed to assess understanding of content from this week’s topics covered in the Learn section (non-cumulative) and will not require use of SPSS. You have 90 minutes to complete these 25 questions. This allows for judicious use of time to refer to assigned readings and presentations (open book / open notes), but should be completed with no other forms of collaboration. Please note: that the first question asks you to indicate your agreement to abide by LUO's Online Honor Code. Answering this question is required . Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 2: Week 2. Attempt History Attempt Time Score LATEST Attempt 1 54 minutes 48 out of 50 Correct answers are hidden. Score for this quiz: 48 out of 50 This attempt took 54 minutes. Question 1 0 / 0 pts 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 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: Which of the following best describes the scenario? Between-subjects Within-subjects Mixed design Question 3 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: What is the independent variable in this scenario? Management type Average length of employment Company type Employee happiness Question 4 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 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: Which of the following best describes the scenario? Between-subjects Within-subjects Mixed design Question 5 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 independent variable in this scenario? Caffeine Memory People who do not consume caffeine regularly Anxiety Question 6 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

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Ordinal Scale Question 7 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 scenario? Between-subjects Within-subjects Mixed design Question 8 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 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: Which of the following best describes the research design? Descriptive Predictive

Quasi-experimental Experimental Question 9 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: Which of the following best describes the research design? Descriptive Predictive Quasi-experimental Experimental Question 10 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 self-report Bar-On EQ-I, which ranges from 0 â€" 110, and is considered â€œscaleâ€ in nature. Assume data meets all assumptions for a parametric test. Question: Which of the following best describes the scenario? Between-subjects Within-subjects Mixed design

Question 11 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 self-report Bar-On EQ-I, which ranges from 0 â€" 110, and is considered "scale" in nature. Assume data meets all assumptions for a parametric test. Question: What is the independent variable in this scenario? Four-year old children Age Emotional intelligence Biological sex Question 12 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: What is the research / alternate hypothesis for this scenario? There is no difference in average length of employment based on management type. There is a difference in average length of employment based on management type. There is no difference in number of years employed based on the type of worker. There is a difference in number of years employed based on the type of worker. Question 13 2 / 2 pts

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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 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? 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 14 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: What is the research / alternate hypothesis for this scenario? There is no difference between sexes for number of years employed. There is a difference between sexes for number of years employed. There is no difference in number of years employed based on the type of worker. There is a difference in number of years employed based on the type of worker. 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: Which of the following best describes the research design?

Descriptive Predictive Quasi-experimental Experimental Question 16 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: What is the null hypothesis for this scenario? There is no difference in average length of employment based on management type. There is a difference in average length of employment based on management type. There is no difference in number of years employed based on the type of worker. There is a difference in number of years employed based on the type of worker. Question 17 2 / 2 pts Conducting multiple independent samples t-tests as opposed to a single One-way ANOVA increases the chances of: Type I Error Type II Error correctly rejecting the null hypothesis correctly retaining (fail to reject) the null hypothesis

Incorrect Question 18 0 / 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 – WRONG 28 – PROBABLY 56 2 Question 19 2 / 2 pts In an ANOVA, the higher the F ratio, the more likely you are to make a Type I Error make a Type II Error correctly reject the null hypothesis correctly retaining (fail to reject) the null hypothesis Question 20 2 / 2 pts In a repeated-measures design, the single largest contributing factor to error variance has been removed. What is that factor?

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individual differences experimenter effects subject bias effects measurement error Question 21 2 / 2 pts If, for a repeated measures ANOVA, F (2, 24) = 4.45, p < .05, how many conditions were there in the study? 2 3 24 48 Question 22 2 / 2 pts _____ is a means of setting a more stringent alpha level in order to minimize Type I errors.

ANOVA The Bonferroni adjustment An F -ratio The sums of squares Question 23 2 / 2 pts When conducting an experiment with more than two levels of the independent variable, a _____ is recommended over a _____ because of the reduced risk of a _____. one-way ANOVA; t test; Type II error one-way ANOVA; t test; Type I error t test; one-way ANOVA; Type II erro t test; one-way ANOVA; Type I error Question 24 2 / 2 pts When the variance _____ the groups is _____ and the variance _____ the groups is _____, we can expect a large F -ratio. between; large; within; large

between; small; within; small between; large; within; small between; small; within; large Question 25 2 / 2 pts Post hoc tests are necessary after an ANOVA when the test is _____ and there are _____ or more groups being compared. significant; 3 significant; 2 not significant; 3 not significant; 2 Question 26 2 / 2 pts The larger the within-groups (error) variance the more difficult it becomes to show the effects of experimental treatment. the easier it becomes to show the effects of experimental treatment.

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the more difficult it becomes to perform the F test. the easier it becomes to show a causal effect of the independent variable on the dependent variable. Quiz Score: 48 out of 50

PSYC515 QUIZ 2 - ANOVA CONCEPTS

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