Find the equation of the regression line. X|12 14 10 9 15 8 _____________________ Y|29 35 28 23 36 18
Use the equation of the regression line to predict y when x = 20. X|5 8 6 10 12 9 ___________________ Y|18 20 15 25 30 25
PART I. HYPOTHESIS TESTING PROBLEM 1 A certain brand of fluorescent light tube was advertised as having an effective life span before burning out of 4000 hours. A random sample of 84 bulbs was burned out with a mean illumination life span of 1870 hours and with a sample standard deviation of 90 hours. Construct a 95 confide
This is a problem #13, chapter 9 - Regression Analysis, from the textbook by Cliff Ragsdale, "Spreadsheet Modeling and Decision Analysis". This problem requires the use of Excel and the add-in, called Solver. The course is Excel-based and Solver is the optimization application used for all problems. Scatter plot of the data nee
Use regression analysis to set up and solve whether or not college experience really determines someone's salary in the work place. I've sampled a few of my colleagues. Years of college and salary = 2yrs / $30,000 4yrs / $60,000 6yrs / $70,000 6yrs / $80,000 8yrs / $100,000 3yrs / $40,000 4yrs / $70,000 5yrs / $60,
Please see attachment. F test of a multiple regression model The finance department of an automobile insurance company uses a multiple regression model to estimate the total number of accident claims that will be filed each month. Based on the most recent months of claims data, the company has selected independent variabl
Hypothesis tests for the correlation coefficient and the slope of the least-squares regression line Newburg Park, Florida is a popular, beach resort town. Property values are fairly high there and, as such, are rather well studied. One topic of study has been the relationship between housing prices and distance from the beach.
An electric utility wishes to examine the relationship between temperature and electricity use in its service region during the summer months. The bivariate data below give the maximum temperature (denoted by , in degrees Fahrenheit) and the electricity use (denoted by , in thousands of kilowatt hours) for a random sample of f
Please see attachment for a full description of the problem. A researcher used stepwise regression to create regression models to predict BirthRate (births per 1,000) using five predictors: LifeExp (life expectancy in years), InfMort (infant mortality rate), Density (population density per square kilometer), GDPCap (Gross Dom
4-16 Thirteen students entered the undergraduate business program at Rollins College two years ago. The following table indicates what their grade-point averages (GPAs) were after being in the program for two years and what each student scored on one part of the SAT exam when he or she was in high school. Is there a meaningful r
The gym has developed the regression model to forecast demand for trainers Demand = 185 + (.15*advertising expenditures)-(.05*doughnuts) + (.23*swim gear sales) What is the forecast for October, being advertising expendeitures of 1000, doughnut sales of 2450, and swim gear sales of 782 in September?
1. In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonald's employees. (a) Write the fitted regression equation. (b) State the degrees of freedom for a two- tailed test for zero slope, and use Appendix D to find the critical value at á = .05. (c) What is your conclusion about the slope? (d) In
1. What is the variable used to predict the value of another called? A) Independent B) Dependent C) Correlation D) Determination 2. Based on the regression equation, we can A) predict the value of the dependent variable given a value of the independent variable. B) predict the value of the independ
Regression Equation: Somewhere in the Milky Way Galaxy, a class of 2,000 students took a course in Astronomy. Find the slope and the intercept term for the regression equation.
Please see attached. Thanks. Somewhere in the Milky Way Galaxy, a class of 2,000 students took a course in Astronomy. The first exam scores and the final exam percentage reached earth, but transmission broke off after only a dozen students' scores were received. This is the only information available about that class. Tha
A) Construct a scatter diagram of the number of crimes and police expenditures per capita, with number of crimes as the predictor variable. What can you say about the relationship between these two variables based on the scatter plot? b) Find the least-squares regression equation that predicts police expenditures per capita fro
See attached question. I think the answer is alpha < n/p - m, but I would like a detailed explanation.
Please see the attached file for the fully formatted problems.
1. The CEO of a small company is concerned about the continual growth in manufacturing costs over the past few years. The following is a time series of the cost per unit (in dollars) for the companys leading product over the past 8 years. A. graphic this time series. Does a linear trend appear? B. Develop the equation for t
I understand how to apply least squares regression to produce an estimated regression equation when a single variable is involved. How is that applied for a MULTIPLE regression analysis? Is there a simultaneous solution involving all variables at once, or is a separate calculation performed for each variable independently?
Administrators at State University believe that decreases in the number of freshman applications that they have experienced are directly related to tuition increases.
Dear OTA, Please help me with steps Thanks 27. Administrators at State University believe that decreases in the number of freshman applications that they have experienced are directly related to tuition increases. They have collected the following enrollment and tuition data for the last decade. Year Freshman A
P3-52; Regression Analysis Mr. Liao, CEO of a manufacturer of fine china and stoneware, is troubled by fluctuations in productivity and wants to compute how manufacturing support costs are related to the various sizes of batches of output. The following data show the results of a random sample of 10 batches of one pattern o
Using Excel as your processing tool, work through three simple regression analysis. First run a regression analysis using the BENEFITS column of all data points in the AIU data set as the independent variable and the INTRINSIC job satisfaction column of all data points in the AIU data set as the dependent variable. Create a g
A problem on Regression is solved in this posting using Excel data Analysis. A complete Interpretation of the Excel output for Regression is given with explanation enabling students to interprete the Regression output of Excel.
*Please show all work, use excel and identify the value and units measured. (Notes for my own Use: Ch8: 6) The National Transportation Safety Board collects data by state (including the District of Columbia) on traffic fatalities. Part of this data is shown in the following table. along with potentially related factors incl
A sample of 7 homes sold last week in Tampa, FL is selected. Can we conclude that as the size of the homes (reported below in thousands of square feet) increased, the selling price (reported in $ thousands) also increases? Home Size (thousands of square feet) Selling Price ($ thousands) Thousand Selling price (in
Something New is a small one-person company that provides elaborate and imaginative wedding cakes to order for very large wedding receptions. The owner of the company would like to understand the cost structure of the company and has compiled the following records of activity and costs incurred. The owner believes that the numbe
In biology, there is an approximate rule, called the bioclimatic rule for temperate climates,that has been known for a couple of hundred years. This rule states that in spring and early summer, periodic phenomena such as blossoming of flowers, appearance of insects, and ripening of fruit usually come about 4 days later for each
Problem #1 The marketing manager of a large supermarket chain would like to determine the effect of shelf space on the sales of pet food. A random sample of 12 equal-sized stores is selected, with the following results: Store Shelf Space X (Feet) Weekly Sales Y (Hundreds of Dollars) 1 5 1.6 2 5 2.2 3 5 1.4 4 10
Bivariate data obtained for the paired variables x and y are shown below, in the table labelled "Sample data." These data are plotted in the scatter plot in Figure 1, which also displays the least-squares regression line for the data. The equation for this line is y^ = 4.85+1.01x . In the "Calculations" table are calculation
3) If e^1.3 is approximated by Langrangian interpolation from the values of e0=1, e1=2.7183, and e2 =7.3891., what are the minimum and maximum estimates for the error? Compare to the actual error. use MATLAB using "polyfit" and "polyval" functions 4) Repeat above problem but now extra polate to get e^2.7. NO
Quarterly billing for water usage is shown below. Year Quarter 1 2 3 4 Winter 64 66 68 73 Spring 103 103 104 120 Summer 152 160 162 176 Fall 73 72 78 88 a. Find the seasonal index for each quarter. b. Deseasonalize the data. c. Find the trend line.