than do infants in general. (b) A study of whether high school students who receive an AIDS prevention program in their school are more likely to practice safe sex than are other high school students. (c) A study of whether memory for abstract
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13. For each of the following studies, make a chart of the four possible correct and
incorrect decisions, and explain what each would mean. (Each chart should be
laid out like Table 6-1, but put into the boxes the possible results, using the
names of the variables involved in the study.)
(a) A study of whether infants born prematurely begin to recognize faces later
than do infants in general.
(b) A study of whether high school students who receive an AIDS prevention
program in their school are more likely to practice safe sex than are other
high school students.
(c) A study of whether memory for abstract ideas is reduced if the information
is presented in distracting colors.
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- Two groups of secretaries operate under the same manager. Both groups have the same number of people, use the same equipment, and turn out about the same amount of work. During one maintenance penod group A had 10 service calls on the equipment, while group B had only 6 calls From these data, would you conclude that group A was harder on the equipment?Suppose that a researcher is interested in the average standardized test score for fifth graders in a local school district. The fifth graders at a specific school would comprise a ___________ and their average test score would be a ___________.(1) interpret the output of a SPSS table, and (2) transform this output into narrative form (as you would with the Results section of a research paper). Make a decision as to whether the results were significant or insignificant. Phrase the results accordingly.
- Prof. Murphy, always interested in improving her teaching effectiveness, has decided to undertake a careful analysis of her evaluations from the past three years. A matter of special concern to her is how she is viewed by students of different majors. She's decided to look at the last question on the teacher evaluation form, Question 17 , which is, "Would you recommend this professor to another student?" Each of Prof. Murphy's students can be placed into one of three categories according to the student's major school, as shown in the contingency table below. (Students who have majors from more than one school are not included.) This table contains a summary of the data that Prof. Murphy has collected for 500 of her students. Each of the 500 students is classified according to two variables: major school ("School of Social Science", "School of Engineering", or "School of Physical Sciences") and response to Question 17 ("No", "Maybe", or "Yes"). In the cells of the table are written…Develop two research hypotheses: (a) one that would be used to examine differences between two unrelated groups and (b) one that would examine differences between two dependent groups.A researcher wishes to see if there is a difference between men and women in the number of cases of mental disorders. She selects a sample of 30 males and 26 females and classifies them according to their mental disorder. The results are shown. At α = 0.10, can the researcher conclude that there is a difference in the types of disorders according to gender? Gender Anxiety Depression Schizophrenia Male 8 12 10 Female 12 9 5
- 5) Suppose that you want to understand whether athletes who are older than80 years of age would have higher memory level if they sleep one more hour.What experimental research design should you take? Why did you choose the one over another? DiscussA researcher wants to know why individuals in Community A have a higher rate of a rare form of cancer when compared to those living in Community B. To find out the reasons for the differences in cancer rates in these two communities, the investigator surveyed residents about their lifestyle, noted the types of businesses that were present in the community and searched medical records. The researcher found that the headquarters for the Toxico Chemical Plant is located in Community A, there is a higher rate of cigarette smoking in this community and residents tended to delay or skip going to the doctor for an annual checkup. In Community B, the largest employer was a department store and on average, residents did not smoke as much as residents from Community A. However, like individuals from Community A, Community B residents tended to delay or skip their annual checkup with their doctor. 1. What makes this a descriptive study?You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food-service department. You conducted a 10-day survey by submitting a simple questionnaire to the 400 patients with each meal, asking that they simply check off that the meal was either satisfactory or unsatisfactory. For simplicity in this problem, assume that the response was 1,000 returned questionnaires from the 1,200 meals each day. The results are as follows: Day Number of Unsatisfactory Meals 1-Dec 74 2-Dec 42 3-Dec 64 4-Dec 80 5-Dec 40 6-Dec 50 7-Dec 65 8-Dec 70 9-Dec 40 10-Dec 75 a. Construct an appropriate control chart based on the questionnaire results, using two-sigma control limits. b. What comments can you make about the results of the survey? c. Show breakdown of computation/work.
- 1. Suppose that two students, A and B, are both 29 years old but A is a female whereas B is a male, A is single while B is married. Both had an income of 4500 cedis when in the university and both have health inventory score of 21. Student A had two kids while in the university whereas student B had 4 kids. Both scored 16 on life satisfaction inventories as well as 23 on socioeconomic status of parents. Student A was a smoker but B was not. A scored 7 while B scored 12 on spirituality inventory. Both finished the university program but whiles a was earning 9000 Ghana cedis seven years after university, B was earning 6800. What is the predicted difference in the life satisfaction score of these two student seven years after university? 2. How much higher is the life satisfaction score predicted to be if the score on spirituality inventory rises by 25? 3. Which one of the pairs of variables selected to be multicollinear may be deleted from the regression and why? 4. Interpret the…1. Suppose that two students, A and B, are both 29 years old but A is a female whereas B is a male, A is single while B is married. Both had an income of 4500 cedis when in the university and both have health inventory score of 21. Student A had two kids while in the university whereas student B had 4 kids. Both scored 16 on life satisfaction inventories as well as 23 on socioeconomic status of parents. Student A was a smoker but B was not. A scored 7 while B scored 12 on spirituality inventory. Both finished the university program but whiles a was earning 9000 Ghana cedis seven years after university, B was earning 6800. What is the predicted difference in the life satisfaction score of these two student seven years after university? 2. How much higher is the life satisfaction score predicted to be if the score on spirituality inventory rises by 25? 3. Which one of the pairs of variables selected to be multicollinear may be deleted from the regression and why? 4. Interpret the…A study was conducted to determine whether the use of seat belts in motor vehicles depends on the educational status of the parents. A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained, and each child was classified according to (1) parents’ educational status (College Degree or Non-College Degree) and (2) seat belt usage (worn or not worn) during the accident. The number of children in each category is given in the table on problem 4 of the excel document. Non-College Degree College Degree Seat Belts not worn 31 148 Seat Belts worn 283 330 total 314 478 What would be the null hypothesis: State the alternative hypothesis: You will reject the H0 if _______________