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- 10. In 1974, Loftus and Palmer conducted a classic s mated speed for the "smashed into" group? Use a college students watched a film of an automobile demonstrating how the language used to ask a ques- tion can influence eyewitness memory. In the study, accident and then were asked questions about what they saw. One group was asked, "About how fast were the cars going when they smashed into each other?" b. Compute the estimated value for Cohen's d to 81 92 study = 10 a = 85 = 160 = .01 group was asked the same question except Another the verb was changed to "hit" instead of "smashed into." The "smashed into" group reported signifi- cantly higher estimates of speed than the "hit" group. Suppose a researcher repeats this study with a sample of today's college students and obtains the following rence age di- etter results. to an Estimated Speed her e the = past For Smashed into Hit n = 15 n = 15 12. peri- М 3 40.8 М 3 34.0 SS = 510 SS = 414 S a. Do the results indicate a significantly…Imagine that a study of prostate cancer was initiated in Des Moines, Iowa. A total of 1,000 men, 55-64 years of age, with no prior evidence of prostate cancer were enrolled in the study. Each year during the study, the men being observed were examined and tested for presence of prostate cancer. The results of annual examinations revealed: 10 cases confirmed at 1st exam 15 additional cases at 2nd exam 20 additional cases at 3rd exam 25 additional cases at 4th (final) exam What is incidence density of prostate cancer in this group?What does aij mean?
- Explain the preparation and validation of instruments in research.You will be conducting a telephone survey of university students who are 21 years of age or older. You have determined that a sample size of 250 will allow reasonable precision and confidence for your estimates of important population parameters. Let’s assume that 15% of the telephone numbers aren’t working, 2% of students you contact are ineligible because they have working telephone numbers but have left the school, about 20% of students will refuse to participate, and you will be unable to reach 30% of those selected for the sample. How many sampling elements should you include in the project?14. Identifying individuals with a high risk of Alzheimer's disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. 18. 7-Minute Screen Cognitive Series Patient 3 11 8. 19 10 22 8. 20 4. 14 13 4 9. 20 14 25 a. Compute the Pearson correlation to measure the degree of relationship between the two test scores. b. Is the correlation statistically significant? Use a two-tailed test with a = .01. c. What percentage of variance for the cognitive scores is predicted from the 7-Minute Screen scores? (Compute the value of r.) 15. For a two-tailed test with a = .05, use Table R 6 to ABCD EFGH
- What is difference between type 1 and type 2 errors?Are couples that live together before they get married more likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 217 of the 671 couples from the study who lived together before they got married were divorced within five years of marriage. 132 of the 421 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.10 level of significance? For this study, we should use The null and alternative hypotheses would be: The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The results are statistically insignificant at αα = 0.10, so there is statistically significant evidence to conclude that the divorce rate…Alzheimer’s disease is a progressive, irreversible disorder, and at this time the cause and cureare unknown. However, researchers at the University of Minnesota developed a brief, efficientand accurate means of predicting Alzheimer’s is persons from 65 to 85 years of age. The testtakes about 10 minutes and requires the patient to try to recall 10 words after using each wordtwice in sentences. According to the researchers, the test results are accurate 95% of the time.If the test is administered to a random sample of 25 persons from 65 to 85 years of age, what isthe probability that the test results are inaccurate for more than 12% of those persons sampled.Show your work and give your answer in the form of a sentence
- I think my numbers are right for the first two parts but can someone help me with part d please and just double check my numbers? Thank you in advance if you can!How would you figure this out? I had gotten the first two wrong.There may be systematic differences on a variety of levels between those who choose to participate in research and those who do not. True False