Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

تمرين 37

Critical Thinking: Interpreting Computer Printouts Refer to the description of a computer display for regression described in problem 5. The following minitab display gives information regarding the relationship between the body weight of a child (in kilograms) and the metabolic rate of the child (in 100kcal/24 hr). The data is based on information from The Merck Manual (a commonly used reference in medical schools and nursing programs).

(a) Write out the least-squares equation.
(b) For each 1-kilogram increase in weight, how much does the metabolic rate of a child increase
(c) What is the value of the sample correlation coefficient r
(d) Interpretation What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line What percentage is unexplained