You may need to use the appropriate appendix table or technology to answer this question.Suppose in 2018, RAND Corporation researchers found that 77% of all individuals ages 66 to 69 are adequately prepared financially for retirement. Many financial planners have expressed concernthat a smaller percentage of those in this age group who did not complete high school are adequately prepared financially for retirement.(a) Develop appropriate hypotheses such that rejection of H, will support the conclusion that the proportion of those who are adequately prepared financially for retirement is smaller for people inthe 66-69 age group who did not complete high school than it is for the population of the 66-69 year old. (Enter != for + as needed.)Ho:p2.77Наp<.77(b) In a random sample of 300 people from the 66-69 age group who did not complete high school, 171 were not prepared financially for retirement. What is the p-value for your hypothesis test?Find the value of the test statistic. (Round your answer to two decimal places.)8.23Find the p-value. (Round your answer to four decimal places. )

Answered: You may need to use the appropriate…

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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An investment company is promoting their mutual investment funds. Their fund specializing in the Hong Kong stock market has been consistently outperforming the Hang Seng Index over the last ten years. The company argues that such strong performance is proof of their great ability in selecting stocks for long-term investment. Based on your understanding of the data generating process and the possible biases associated with it, provide an alternative interpretation of the statistics about fund performance.
3. Researchers Regine Dilla and associates wanted to determine whether consumption of cola is associated with lower bone mineral density. They looked at 1125 men and 1413 women in the Framingham Osteoporosis Study, which is a cohort that began in 1971. The first examination in this study began between 1971 and 1975, with participants returning for an examination every 4 years. Based on results of questionnaires, the researchers were able to determine cola consumption on a weekly basis. Analysis of the results indicated that women who consumed at least one cola per day (on average) had a bone mineral density that was significantly lower at the femoral neck than those who consumed less than one cola per day. The researchers did not find this relation in men. (a)Why is this a cohort study? (b)What is the response variable in this study? What is the explanatory variable? (c)Is the response variable qualitative or quantitative?
1. The percentage of 12- to 17-year-olds who reported talking at least once in the past year with their parents about the dangers of drug, tobacco, or alcohol is 60% nationally. A state youth council believes this proportion is higher in their state, where there has been an intense media campaign about this issue. A survey of randomly chosen students from across the state shows 1032 of 1642 students reporting they are having these conversations with their parents. Is there evidence that the percent of students using drugs, tobacco or alcohol in this state is above the national rate?
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
1. Do you think Don’s theory is a good example of a theory? Is his hypothesis sound? 2. Is his study an experiment or a correlational study? Why or why not? 3. Do you think Don’s fourth graders would be able to understand and participate in the study and provide informed consent for their participation? 4. Do you think Don’s method will yield reliable results? Why or why not? 5. What do you suppose the students’ parents would think of the study? What will his instructional supervisor think? What do you think?
7.
not use excel. only handwritten with all steps must be includeed.
The Knight Foundation investigates whether high school students agreed with the statement that people should be allowed to burn or deface the American flag as a political statement. This question was asked in a survey of a representative sample of high school students in 2004 and also in a survey of a representative sample of high school students in 2014. Suppose that the sample size was 1000 in each of the two years. Data consistent with summary values given in the paper are summarized in the accompanying table. Is there convincing evidence that the proportions falling into each of the response categories were not the same for high school students in 2004 and 2014?
Now assuming the professor is female. What is the predicted difference in performance between a female and a male student now?
1. A developmental psychologist would like to determine how much fine motor skill changes for children from age 3 to age 5. He takes a random sample of 9 three-year old children and gives each a manual dexterity test that measures fine motor skill. He tests these same children one and two years later, when they are each four- and five-years old. Higher scores on this test indicate better fine motor skills. Is there a significant difference in the motor skills at these ages? Test with an α = 0.01 and show ANOVA SPSS output.
4
10. The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them suffered from depression or a depressive illness. If you were conducting a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population, what would the null and alternative hypotheses be? a. Ho: b. Ha

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