Answered: 22. Oishi and Shigehiro (2010) report… | bartleby

MATLAB: An Introduction with Applications

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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Question

of μ -
=D40. The well-being scores
an average score
for this sample are as follows: 38, 37, 41, 35, 42
40, 33, 33, 36, 38, 32, 39.
a. On the basis of this sample, is well-being for
frequent movers significantly different from well-
being in the general population? Use a two-tailed
test with a = .05.
b. Compute the estimated Cohen's d to measure the
size of the difference.
c. Write a sentence showing how the outcome of
the hypothesis test and the measure of effect size
would
appear in a research report.
LEGO
wa Ach is a hed amount vrithout regard
charged to oonnect service This pays for trie sevicemas
bua ou ad
amout added to or decucted tom your bilil because of che
charge to fund Public Benefits Programs demand-si
constumpton and energy.cost adustment charges r
sessent.dollaramount.imens
the State of Califor

st
is
22. Oishi and Shigehiro (2010) report that people who
move from home to home frequently as children
tend to have lower than average levels of well-being
as adults. To further examine this relationship, a
psychologist obtains a sample of n = 12 young
adults who each experienced 5 or more different
homes before they were 16 years old. These
participants were given a standardized well-being
questionnaire for which the general population has
a

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2. In studying the effect of a drug for treating patients with respiratory problems, a researcher obtained a sample of 12 consenting patients, who, after discussion with their doctor, chose a respiratory drug they would receive. Patients' respiratory tests were assessed twice over a two-month period after initiating the treatment. Research question: The researcher wants to know if there is a significant difference between the group in their second test and those that didn't take the drug in their overall mean of 3.35 in average respiratory scores with a standard deviation of .08. Is there a difference between the two means - does the drug work? Carry out 9 steps of hypothesis testing. Respiratory Test 2 3.4 3.4 3.3 3.4 3.3 3.3 3.3 3.2 3.2 3.2 3.2 3.3 Σ-39.5
8. Using multiple regression, researchers found that greater levels of sibling aggression predicted worse mental health in children, even when controlling for the parents' education level and the child's age, gender, and ethnicity. Can the researchers conclude that sibling aggression causes worse mental health? a. Yes, because covariance, temporal precedence, and internal validity have all been established. b. No, because other variables not measured by the researchers could explain the relationship between sibling aggression and mental health. No, because temporal precedence has not necessarily been established. d. both (b) and (c) C.
A report described teens' attitudes about traditional media, such as TV, movies, and newspapers. In a representative sample of American teenage girls, 42% said newspapers were boring. In a representative sample of American teenage boys, 45% said newspapers were boring. Sample sizes were not given in the report. (a) Suppose that the percentages reported had been based on a sample of 50 girls and 40 boys. Is there convincing evidence that the proportion of those who think that newspapers are boring is different for teenage girls and boys? Carry out a hypothesis test using a = 0.05. (Use Pgirls - Pboys.) Find the test statistic. (Round your answer to two decimal places.) Z = USE SALT Find the P-value. (Round your answer to four decimal places.) P-value = State your conclusion. O Reject Ho. We do not have convincing evidence that the proportion of girls who say that newspapers are boring is different from the proportion of boys who say that newspapers are boring. O Fail to reject H. We…
2. In a study of parents' feelings about a required course in consumer education taught to their children, a random sample of 360 parents are classified according to whether they have one, two or more children in the school system, and also whether they feel that the course is poor, adequate or good. The results are shown in the table to the right. Test at the 0.05 level of significance whether there is a relationship between parents' reaction to the course and the number of children they have in the school system. Poor Adequate Good 1 kid 48 55 57 2 kids 40 53 46 3+ kids 12 29 20
The Interpersonal Reactivity Index is a survey designed to assess four different types of empathy. One type of empathy, called, Empathetic Concern, measures the tendency to feel sympathy and compassion for people who are less fortunate. The index ranges from 0 (less empathetic) to 28 (more empathetic). The following data, representing random samples of 16 males and 16 females, are consistent with results reported in psychological studies. Boxplots show that it is reasonable to assume that the populations are approximately normal. 13 8 22 20 20 12 15 18 Males 16 13 26 21 23 25 15 23 17 22 Females 20 26 25 28 24 16 19 23 21 23 15 26 19 25 Can you conclude at the 0.05 significance level that there is a difference in mean empathy scores between men and women?
4. A psychologist has prepared an “Optimism Test" that is administered yearly to graduating college seniors. The test measures how each graduating class feels about its future-the higher the score, the more optimistic the class. Last year's class had a mean score of u = 28. A sample of n = 10 seniors from this year's class was selected and tested. The scores for these seniors are below. Is this year's class different in its level of optimism from last year's class (p < .05)? 19 23 19 25 21 21 26 22 22 20
2. The scores for 15 persons on the Stressful Life Events Inventory (SLEI) and the scores for 15 other persons on the Major Stressors Questionnaire (MSQ) are presented in the Assessment 3 Data Excel file in the Stress Scores tab. For both surveys, higher scores mean that the person has experienced more stressors recently, suggesting a greater risk for stress-related symptoms such as acute anxiety attacks. Open the Assessment 3 Data Excel file and look over the SLEI and MSQ raw scores and z-scores in the Stress Scores tab. A. Please take a look at Participant 8 and 23 raw scores and z-scores. Who is at the greatest risk for acute anxiety attacks, Participant 8 or 23? Please make sure to briefly explain your answer based on the z- scores. B. What is the probability that someone will score higher than 40 on the SLEI? Is this unusual? Why or why not? What is the probability that someone will score higher than 125 on the MSQ? Is this unusual? Why or why not? (Please make sure to look up…
Some researchers have noted that adolescents who spend a lot of time playing video or computer games are at greater risk for depression and violence. This is an example of: a. an observational study with lurking variables that may explain the association. b. a paired data experiment, because we are studying both aggression and game playing. c. a single-blind experiment, because the subjects knew they were playing games. d. a valid conclusion, because more time yields more aggression is a positive association.
A research study reports the results of a correlational study that shows a negative relationship between parent stress at work and the mental health of their children. What possible findings would show this? A. Parents who report higher stress at work tend to have children with higher mental well-being scores B. Parents to report higher stressed out work tend to have children with higher anxiety scores C. Parents who report lower stress at work tend to have children with lower anxiety scores D. Parents who report lower stress at work tend to have children with higher mental well-being scores
2.- The journal Behavioral Research in Accounting published a study of Machiavellian traits in accountants. Machiavellian describes negative character traits that include manipulation, cunning, duplicity, deception, and bad faith. A questionnaire by email was administered to a random sample of 700 accounting alumni of a large southwestern university; however, due to nonresponse and incomplete answers, only 198 questionnaires could be analyzed. Several variables were measured, including age, gender, level of education, income, job satisfaction score, and Machiavellian (“Mach") rating score. The research findings suggest that Machiavellian behavior is not required to achieve success in the accounting profession. a) What is the populatidn of interest to the researcher? Answer: Business accountants in the southwest Accountants in general Accounting alumni from this university Business alumni from this university b) What inference was made by the researcher? Answer: Accountants are always…
A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…
In a study examining the effect of humor on interpersonal attractions, McGee and Shevlin (2009) found that a man's sense of humor had significant effect on how he was perceieved by woman. In the study, female college students were given brief descriptions of a po tential romantic partner and then rated the attractiveness of the male on a scale from 1 (low) to 7 (high). The fictitious male was described positively as being single , ambitious, and having good job prospects. In one dition, the description also said that he had a great sense of humor. The results showed that the description was rated significantly higher when "a sense of humor" was included. To further examine this effect, a researcher selected a sample of n = 16colle college males and asked them to read a brief description of a female and then rate the attractiveness of the woman in the description . The description had been used in previous research but was modified by adding a statement describing a good sense of humor…

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