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1. The data in the table below are given for 9 patients with aplastic anemia. Table. Hematologic data for patients with aplastic anemia Patient Lymphocytes number % Reticulocytes ( per mm2) 1 3.6 1700 2 2.0 3078 3 0.3 1820 4 0.3 2706 5 0.2 2086 6 3.0 2299 7 0.0 676 8 1.0 2088 9 2.2 2013 a. Fit a regression line relating the percentage of reticulocytes (x) to the number of lymphocytes (y). Interpret the estimated slope. b. Test for the statistical significance of this regression line using the F test. c. What is R2 for the regression line? R2 = 0.050 d. What does R2 mean? e. Test for the statistical significance of the slope using the t test. What do you conclude? 2. The Update to the Task Force Report on Blood Pressure Control in Children reported the observed 90th percentile of SBP in single years of age from age 1 to 17 based on prior studies. The data for boys of average height are given in the table below. Suppose we seek a more efficient way to display the data and choose linear regression to accomplish this task. Table. 90th percentile of SBP in boys ages 1- 17 of average height Age (x) SBPa ( y) 1 99 2 102 3 105 4 107 5 108 6 110 7 111 8 112 9 114 10 115 11 117 12 120 13 122 14 125 15 127 16 130 17 132 a. Fit a regression line relating age to SBP, using the data above. Provide the mathematical form of the regression line you obtain and also describe it in lay terms. b. Provide a 95% confidence interval for the parameters of the regression line. c. What is the predicted blood pressure for an average 13-year-old boy as estimated from the regression line? d. What is the standard error of the estimate in c? e. Answer c and d for a 17-year-old boy. e. Do you think the linear regression provides a good fit to the data? Why or why not? Use residual analysis to justify your answer.
jane wants to setup a photo shop. the cost to rent an office is 150 per week. the variable cost of making one photo is
What was the total number of participants surveyed for the study and what was the total number of participants who completed the entire survey?
What are the assumptions made in performing the hypothesis test in Question 3? Are these assumptions reasonable? Provide explanation to substantiate your view.
What is the conclusion you can draw regarding research question that was posed in this research - would you now move on to interpret the results of the Tests of Between-Subjects Tests?
Perspective about the problem you are trying to analyze; in other words, you should review the literature concerning your subject. The library or the web will be a good source of information.
Calculate the percentage of variance explained for r = 0.53. Is this correlation clinically important and what is the r value listed for the relationship between variables 4 and 9?
a) Explain why ground-wave propagation is more effective over sea water than dessert terrain. b) Why do stations in the AM broadcast band always use vertically polarized antennas
Expansion Plan Demand Growth
question 1 a normal population has a mean of 78 and a standard deviation of 6. you select a sample of 50. evaluate the
Researchable hypothesis for Accounts Receivable
question 1 a package delivery service claims that no more than 5 percent of all packages arrive at the address late.
Evaluate the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which would you expect to hold their value best in a down market?
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