Scenario 2Researchers have long known that people feel lonely when they are ostracized by other people. A researcherwonders if being ostracized by a computer also makes people feel lonely. To test their hypothesis, theresearcher recruits 18 people to participate in a study and measures their current feelings of loneliness using theSocial Loneliness Scale (SLS). The scale's scores range from 0 to 11 and form an interval scale that is normallydistributed. After completing the pretest measure of loneliness, participants play a game called Cyberball. In thegame, participants simply play catch with computer-generated players. The participants in the study know thatthe players in the game are computer controlled and are not controlled by human players. When participantsbegin the game, the computer-generated players pass the ball back and forth with each other to the participant.After 30 throws, the computer-generated players stop passing the ball to the participant. This exclusion (i.e.ostracism) continues for 20 passes before the game ends. After playing the game, all participants complete theSLS again.Using this vignette and the data below to answer the following questions:Post-testscoresParticipantNumber123456789101112131415161718Pretestscores4568412653422454364576533553534465486. Using the data provided, determine the null and alternative hypotheses. Then determine how many tails thisresearch question has.7. Using the data provided, recreate this table in Excel and use what you have learned to calculate the meandifference and standard deviation for the mean differences. Then use these values to calculate the SEM for thesample8. Use your calculated SEMs and other values to calculate your obtained t-statistic9. Using Appendix B in your text, the degrees of freedom for this research question, and the number of tailsyour hypothesis has to determine the t-critical value10. Based on your calculated t-statistic and t-critical value, engage in hypothesis testing. What is your decisionregarding the research question

The objective is to test whether there exists a significant difference between pre-test scores and…

Answered: Scenario 2 Researchers have long known…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 708.2. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 31 high-income individuals and found the sample mean credit score to be 723.3 with a standard deviation of 80.9. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the α = 0.05 level of significance. C State the null and alternative hypotheses. Ho: HY H₁: (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) Make a conclusion regarding the hypothesis. the null hypothesis.…
“Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Suppose you are interested in the emotional well-being not only of the victims but also of bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bullies and a group of bully-victims using an 18-item, 5-point anxiety scale. The group of 84 bullies scored an average of 40.1 with a sample standard deviation of 3.8 on the anxiety scale. The group of 67 bully-victims scored an average of 46.8 with a sample standard deviation of 11.6 on the same scale. Suppose you intend to conduct a hypothesis test on the difference in population means. In preparation, you identify the sample of bullies as sample 1 and the sample of bully-victims as sample 2. Organize the provided data by completing the following table:
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