A researcher hypothesised that reality TV show contestants start off with personality disorders that are exacerbated by being forced to spend time with people as attentionseeking as them. To test this hypothesis, she gave eight contestants a questionnaire measuring personality disorders before and after they entered the show. A second group of eight people were given the questionnaire at the same time; these people were short-listed to go on the show, but never did. What are the dependent and independent variables in this study?

A researcher hypothesised that reality TV show contestants start off with personality disorders that are exacerbated by being forced to spend time with people as attentionseeking as them. To test this hypothesis, she gave eight contestants a questionnaire measuring personality disorders before and after they entered the show. A second group of eight people were given the questionnaire at the same time; these people were short-listed to go on the show, but never did. What are the dependent and independent variables in this study?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 25PPS

See similar textbooks

Similar questions

Which of the independent variables retains the strongest association with the number of children a respondent has when all other variables in the model are controlled?
Consider that the results of a research study conclude that the “effect of social media use on anxiety depends on gender.” Which statement below is correct based on this conclusion? a. The research study uncovered a main effect of social media use, but no main effect of gender or interaction between gender and social media use. b. The research study uncovered a main effect of gender and interaction of gender and social media use, but not main effect of social media use. c. The research study uncovered an interaction between social media use and gender, but no main effects. d. The research study uncovered no main effects of gender or social media use, as well as no interaction between gender and social media use.
Suzanne Zeedyk, a developmental psychologist at Dundee University’s School of Psychology, conducted a pilot study in which parents started a half-hour walk with their infants in a parent-facing or an away-facing stroller and then switched to the other type of stroller midway. Her results suggest that parents talked less to the babies, the babies had higher heart rates, and they were less likely to fall asleep in away-facing strollers than in parent-facing strollers. You are interested in testing the hypothesis that babies who travel in parent-facing strollers have different expressive vocabularies than babies who travel in away-facing strollers. You randomly assign 13 newborns to parent-facing strollers and 13 newborns to away-facing strollers. You then test the babies’ expressive vocabularies at age 36 months using the Expressive Vocabulary Test (EVT), which is designed primarily to assess children’s expressive vocabulary. The sample means and sums of squares of the scores for each of…
Suzanne Zeedyk, a developmental psychologist at Dundee University’s School of Psychology, conducted a pilot study in which parents started a half-hour walk with their infants in a parent-facing or an away-facing stroller and then switched to the other type of stroller midway. Her results suggest that parents talked less to the babies, the babies had higher heart rates, and they were less likely to fall asleep in away-facing strollers than in parent-facing strollers. You are interested in testing the hypothesis that babies who travel in parent-facing strollers have different receptive vocabularies than babies who travel in away-facing strollers. You randomly assign 18 newborns to parent-facing strollers and 18 newborns to away-facing strollers. You then test the babies’ receptive vocabularies at age 18 months using the Peabody Picture Vocabulary Test—Revised (PPVT-R), which is designed primarily to assess children’s receptive vocabulary. The sample means and sums of squares of the…
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380380 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 6%6% 7%7% Slightly Optimistic 30%30% 26%26% Slightly Pessimistic 21%21% 24%24% Pessimistic 43%43% 43%43% Copy Data Step 4 of 10 : Find the expected value for the number of respondents who are optimistic. Round your answer to two decimal places.
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380380 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 6%6% 7%7% Slightly Optimistic 30%30% 26%26% Slightly Pessimistic 21%21% 24%24% Pessimistic 43%43% 43%43% Copy Data Step 3 of 10 : State the null and alternative hypothesis in terms of the expected proportions for each category.
Is it possible to have several dependent variables in a model? Are several variables possible in a decision-making problem? Which model—descriptive, predictive, or prescriptive—of a particular choice issue would you be most likely to employ if it were offered to you? Why? Give an example of a well-known corporate, political, or military leader who made a choice that either had a positive or negative impact. What distinguishes a computer model from a spreadsheet model?
Suppose that in a research it was discovered that those who majored in math, engineering, or computer science scored higher on tests measuring "problem-solving" ability at the end of 4 years of college than did those students who did not major in these fields. A. What is (are) the independent variable(s)?
In studies examining the effect of humor on interpersonal attractions, McGee and Shevlin (2009) found that an individual’s sense of humor had a significant effect on how the individual was perceived by others. In one part of the study, female college students were given brief descriptions of a potential romantic partner. The fictitious male was described positively as being single and ambitious and having good job prospects. For one group of participants, the description also said that he had a great sense of humor. For another group, it said that he has no sense of humor. After reading the description, each participant was asked to rate the attractiveness of the man on a seven-point scale from 1 (very unattractive) to 7 (very attractive). A score of 4 indicates a neutral rating. The females who read the “great sense of humor” description gave the potential partner an average attractiveness score of M = 4.53 with a standard deviation of s = 1.04. If the sample consisted of n = 16…
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 250250 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 50%50% 52%52% Slightly Optimistic 16%16% 10%10% Slightly Pessimistic 11%11% 15%15% Pessimistic 23%23% 23%23% Copy Data Step 6 of 10 : Find the value of the test statistic. Round your answer to three decimal places. Step 7 of 10: Find the degrees of freedom associated with the test statistic for this problem Step 8 of 10: Find the critical value of the test at the 0.025 level of significance. Round your answer to three decimal places.step 9 of 10: make the decision to reject or fail to reject…
In 2013, psychology researchers conducted an experiment featuring 40 undergraduate college students, each of whom took a 20-question general-knowledge test on a computer. Participants were given four possible answers and instructed to pick the correct one. Before doing so, half the students were told that just before each question was asked, the correct answer was momentarily flashed onto the screen. They were informed that this happened too quickly for them to process the information consciously, but assured that it would register in their brains. This was the placebo treatment. In the control treatment participants were not told this. The researchers write that: “Participants in the placebo condition who believed they had been exposed to the correct answers subliminally scored higher than participants in the control condition.” The researchers conducted a hypothesis test to determine if the proportion of correct answers is significantly different for participants in the placebo…
Under what circumstances could an independent variable in one study be a dependent variable in another study?