I'm in the number crunching phase of some research. I had an advanced stats class two years ago, hence, the haziness on the interpretation end. I compiled the data from the Metropolitan Chicago Information Center (MCIC) and developed two hypotheses relative to data about residents' perception of crime in their neighborhoods for
Fred is the manager of human resources at St. Luke Hospital. As part of his yearly report to the president of the medical center, he is required to present an analysis of the salaried employees. Because there are over 1,000 employees, he does not have the staff to gather information on each employee, so he selects a random sam
A mortgage department of a large bank is studying its recent loans. Of particular interest is how such factors as the value of home (in thousands of dollars), education level of the head of household, current monthly mortgage payment (in dollars), and sex of the head of the household (male = 1, female = 2) relate to the family
Fran's Mart are located throughout Erie, Pennsylvania, the owner would like to expand into other communities in northwestern Penn. and southwestern New York. As part of her presentation to the local bank, she would like to better understand the factors that make a particular outlet profitable. She must do all the work herself,
In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows. b1=2.676-----sb1=0.56 b2=-0.880----sb2=0.71 Conduct a test of hypothesis to determine whether either independent variable has a coefficient equal to ze
Cellulon, a manufacturer of a new type of home insulation wants to develop guidelines for builders and consumers regarding the effects on natural gas consumption (1) of the thickness of the insulation in the attic of the home and (2)of the outdoor temperature. In the laboratory they varied the insulation thickness and temperatu
Archaeopteryx is an extinct beast having feathers like a bird but teeth and a long bony tail like a reptile. Five fossil specimens have preserved both the femur and humerus bones. The measurements (in centimeters) for each bone are given below. Femur 38 56 59 64 74 Humerus 41 63 70 72 84 Scientists are interested in de
A doctor wanted to determine whether there is a relation between a male's age and his HDL (so called good) cholesterol. He randomly selected 17 of his patients and determined their cholesterol. a. Determine the least-squares regression equation from the sample data. b. Compute the standard error of y' c. Compute t
Is an interaction term in multiple regression is combining two variables. How would you use an interaction term in multiple regression?
The owner of an office building studies heating cost versus daily high temperatures. He records the following data: Temperature (deg C) @ Cost ($100) ------------------------------- 1 @ 9 4 @ 5 6 @ 3 10 @ 2 He proposes a regression equation to predict the cost of heating the building. Wh
Part of a CFO's job is to determine the direction of the company and which divisions/projects should be expanded. This CFO selects a sample of 30 projects and wants to find out about the relationship between Profit (Y measured in 1000's) per project and number of Employee Hours (EmployHrs) involved in each project (measured in