Paper Writing Services examine the relationsp between ethnicity (defined as different categories) and political affiliation? How about club membersp (yes or no) and gh school
Abstract 

number of words known. b. Test for the significance of the correlation at the .05 level of significance. c. Recall what you learned in Ch. 5 of Salkind (2011)about correlation coefficients and interpret ts correlation. 9. How does linear regression differ from analysis of variance? 10. Betsy is interested in predicting how many 75yearolds will develop Alzheimer’s disease 
Some questions in Part A require that you access data from Ts data is available on the student website under the Student Text Resources link. 1. Use the following data to answer Questions 1a and 1b. a. Compute the Pearson productmoment correlation coefficient by hand and show all your work. b. Construct a scatterplot for these 10 values by hand. Based on the scatterplot, would you predict the correlation to be direct or indirect? Why? 2. Rank the following correlation coefficients on strength of their relationsp (list the weakest first): 3. Use IBM SPSS software to determine the correlation between hours of studying and grade point average for these honor students. Why is the correlation so low? 4. Look at the following table. What type of correlation coefficient would you use to examine the relationsp between ethnicity (defined as different categories) and political affiliation? How about club membersp (yes or no) and gh school GPA? Explain why you selected the answers you did. 5. When two variables are correlated (such as strength and running speed), it also means that they are associated with one another. But if they are associated with one another, then why does one not cause the other? 6. Given the following information, use Table B.4 in Appendix B of to determine whether the correlations are significant and how you would interpret the results. a. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a onetailed test. b. The correlation between the number correct on a math test and the time it takes to complete the test is –.45. Test whether ts correlation is significant for 80 cldren at the .05 level of significance. Choose either a one or a twotailed test and justify your choice. c. The correlation between number of friends and grade point average (GPA) for 50 adolescents is .37. Is ts significant at the .05 level for a twotailed test? 7. Use the data in Ch. 15 Data Set 3 to answer the questions below. Do ts one manually or use IBM SPSS software. a. Compute the correlation between income and level of education. b. Test for the significance of the correlation. c. What argument can you make to support the conclusion that lower levels of education cause low income? 8. Use the following data set to answer the questions. Do ts one manually. a. Compute the correlation between age in months and number of words known. b. Test for the significance of the correlation at the .05 level of significance. c. Recall what you learned in Ch. 5 of Salkind (2011)about correlation coefficients and interpret ts correlation. 9. How does linear regression differ from analysis of variance? 10. Betsy is interested in predicting how many 75yearolds will develop Alzheimer’s disease and is using level of education and general physical health graded on a scale from 1 to 10 as predictors. But she is interested in using other predictor variables as well. Answer the following questions. a. What criteria should she use in the selection of other predictors? Why? b. Name two other predictors that you tnk might be related to the development of Alzheimer’s disease. c. With the four predictor variables (level of education, general physical health, and the two new ones that you name), draw out what the model of the regression equation would look like. 11. Joe Coach was curious to know if the average number of games won in a year predicts Super Bowl performance (win or lose). The variable was the average number of games won during the past 10 seasons. The variable was whether the team ever won the Super Bowl during the past 10 seasons. Refer to the following data set: a. How would you assess the usefulness of the average number of wins as a predictor of whether a team ever won a Super Bowl? b. What’s the advantage of being able to use a categorical variable (such as 1 or 0) as a dependent variable? c. What other variables might you use to predict the dependent variable, and why would you choose them? Peter was interested in determining if cldren who t a bobo doll more frequently would display more or less aggressive behavior on the playground. He was given permission to observe 10 boys in a nursery school classroom. Each boy was encouraged to t a bobo doll for 5 minutes. The number of times each boy struck the bobo doll was recorded (bobo). Next, Peter observed the boys on the playground for an hour and recorded the number of times each boy struck a classmate (peer). 1. Conduct a linear regression to predict the number of times a boy would strike a classmate from the number of times the boy t a bobo doll. From the output, identify the following: a. Slope associated with the predictor b. Additive constant for the regression equation c. Mean number of times they struck a classmate d. Correlation between the number of times they t the bobo doll and the number of times they struck a classmate e. Standard error of estimate the questions below. Be specific and provide examples when relevant. any sources consistent with APA guidelines.
Sample references 


Need your ASSIGNMENT done? Use our paper writing service to score better and meet your deadline.
Click Here to Make an Order Click Here to Hire a Writer