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# Regression Analysis

### Regression Modeling to predict time it takes to process invoices for large bank

See attached data file. The manager of the purchasing department of a large banking organization would like to develop a model to predict the amount of time it takes to process invoices. Data are collected from a sample of 30 days, and the number of invoices processed and completion time, in hours, is stored in the file invoi

### The Purpose of Using Regression Analysis

What is the purpose of using regression analysis? How may it be used to formulate strategies? Provide examples related to strategy formulation and implemenation. How is regression analysis used in forecasting? Provide examples.

### Statistical regression analysis: Corporate tax vs. capital formation, world economy

See the attached file. 1) What can you now infer about the relationship between Corporate Taxes and Capital Formation (Investment)? Is it a positive or negative relationship? 2) Based on the week 5 lecture, look at the original table ... it is a snapshot of the world economy from the year 1983. Examine the

### Describing correlational and causation research

Briefly describe correlational research. Name a variable from this study and one from the workplace that might prove to provide a correlational relationship and explain why you would choose these two? What did you learn about correlation and causation while completing the course?

### Bio-Statistics: Multiple Regression Analysis

1. Consider the data shown in this table measured in a sample of n=25 undergraduates in an on-campus survey of health behaviors. Enter the data into an excel worksheet for analysis. 2. Estimate the multiple linear regression equation relating number of cups of coffee per week, female gender, and number of hours of exercise pe

### Perform a Regression and Hypothesis Test

Perform a regression analysis based on the attached data: Team C want to show a scatter plot with sample correlation coefficients for 15 Major League Baseball teams randomly chosen out of 30 Major League Baseball teams. Is the correlation (r = .3182) between wins and salary statistically significant?

### Regression: Data Point Table

The data table below tabulates a Pizza Parlor's advertising expenditures and sales for 8 consecutive quarters. The marketing manager wants to know how much of an impact current advertising will have on sales two quarters from now. When running a regression with the dependent variable "Sales" and the independent variable "A

### Develop a regression model for movie demand

I have also attached a sample xls file that contains the 5 steps referred to in the word doc. The data is located in the movie.xls file. Develop a regression model for movie demand. Follow the five steps outlined in the sample XLS file. ? Accomplish a correlation table and scatter plots with trend lines of all of the varia

### 37. A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94. Using the .05 significance level, can we conclude that there is a positive association between the two variables? 40. A suburban hotel derives its gross income from its hotel and restaurant operations. The owners are interested in the relationship between the number of rooms occupied on a nightly basis and the revenue per day in the restaurant. Below is a sample of 25 days (Monday through Thursday) from last year showing the restaurant income and number of rooms occupied. Use a statistical software package to answer the following questions.

37. A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94. Using the .05 significance level, can we conclude that there is a positive association between the two va

### Forecasting (moving average/ exponential smoothing) problems

Q17.26 (pp661). The dean of a law school has developed a regression equation for estimating the starting salary (thousands of dollars) of a new graduate on the basis of two independent variables: x1 = the score on the Law School Admission Test (LSAT) at the time of the application, and x2

### Regression Analysis for Alzheimer's Disease Data

Problem 15 in Chapter 16 described a study examining the effectiveness of a 7-Minute Screen test for Alzheimer's disease. The study evaluated the relationship between scores from the 7-Minute Screen and scores for the same patients form a set of cognitive exams that are typically used to test for Alzheimer's disease. For a sampl

### 5 Problems: Chi-Square, Regression, Regression Equation & Relation, etc...

In preparation for my final in two weeks, I have this set of study problems. In order to ensure I am working these correctly, I have created problems based of study problems and wish to compare work. Please complete the problems, show solutions in excel if applicable and explain. I really need to understand the concept as the

### Multiple regression

If sales is the variable you are trying to explain and you have 2 independent variables of color and price. The color coefficient is -5, and the price coefficient is -20. You have an intercept coefficient of 500 and an r-squared value of .2500. Using this multiple regression analysis, predict the amount of sales with a color ran

### Pearson Product-Moment Correlation and Hypothesis Test

A woman was interested in the relationship between the pollen count and the severity of her allergy symptoms. She developed a questionnaire that measured the severity of her symptoms with higher scores indicating worse allergy symptoms. She filled out and scored the questionnaire on 14 randomly selected days. She also had a frie

### This part of the quote, "The formulation of a problem is far more often essential than its solution, which may be merely a matter of mathematical or experimental skill" illustrates the following which I want you to expand on: 1) Planning and Designing is often the most important step of s research process. The way you design and collect your data is more important than the analysis of the data and subsequent interpretation of the result of the analyses.

This part of the quote, "The formulation of a problem is far more often essential than its solution, which may be merely a matter of mathematical or experimental skill" illustrates the following which I want you to expand on: 1) Planning and Designing is often the most important step of s research process. The way you design

### Example Regression Analysis

Prepare a report using Excel as your processing tool to process three simple regression analyses. 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 varia

### Statistics Exercises: 12.48, 12.50, 13.30,13.32, 14.16

Week 5 E-Text Exercise - Please use Attached Documents Chapter 12 â?" 14 Text Exercises â?" Individual Assignment 12.48 â?" In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonaldâ??s employees. (a) Write the fitted regression equation. (b) State the degrees of freedom for a two

### Statistics: Define autocorrelation, and multicollinearity

Define autocorrelation in the following terms: a. In which type of regression is it likely to occur? b. What is the negative impact of autocorrelation in a regression? c. Which method is used to determine if it exists? d. If found in a regression, how is autocorrelation eliminated? Define multicollinearity in the followin

### Forecast Techniques, Forecast Accuracy Measures and Regression Analysis

Please show all work. 5. The chairperson of the department of management at State University wants to forecast the number of students who will enroll in production and operations management (POM) next semester, in order to determine how many sections to schedule. The chair has accumulated the following enrollment data for th

### Moving Average Forecast, Exponential Smoothing Forecast, Adjusted Exponential Smoothing Forecast, MAD, MAPD, Cumulative Error, Comparison among different Forecast Techniques and Regression Analysis

1. The saki motorcycle dealer in Minneapolis wants to make an accurate forecast of demand for the Saki Super TXII motorcycle during the next month. Because the manufacturer is in Japan, it is difficult to send motorycles back or reorder if the proper number is not ordered a month ahead. From sales records, the d

### Statistics: Hypothesis testing, Regression analysis, Autocorrelation, Multicollinearity:

Construct a 95 per cent confident interval given the information below: A certain brand of fluorescent light tube was advertised as having an average illumination life-span of... Given the following data from two independent samples from which the population standard deviation is known, conduct a two-tailed hypothesis test to d

### Forecast based on Linear Regression Model

Carpet City wants to develop a means to forecast its carpet sales. The store manager believes that the store's sales are directly related to the number of new housing starts in town. The manager has gahtered data from county records on monthly housing construction permits and from store records on monthly sales. These data are a

### Job Satisfaction Survey -Regression Analysis

See attached data file. Prepare a report using Excel as your processing tool to process three simple regression analyses. 1. 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 d

### Biostatistics: Multivariable Regression Analysis

A study is conducted in patients with HIV. The primary outcome is CD4 cell count, which is a measure of the stage of the disease. Lower CD4 counts are associated with more advanced disease. The investigators are interested in the assocition between vitamin and mineral suppliments and CD4 count. A multiple regression analysis is

### Multiple Regression and Correlation Analysis

Suppose that the sales manager of a large automotive parts distributor wants to estimate as early as April the total annual sales of a region. On the basis of regional sales, the total sales for the company can also be estimated. If, based on past experience, it is found that April estimates of annual sales are reasonably accu

### Multiple Regression Model Purpose

We are given a multiple regression model : InQt=1.2789-0.1647 In Pt+ 0.5115 In It + 0.1483 In P't - 0.0089T - 0.961D1t - 0.1570D2t-0.0097D3t Its purpose is to describe the relationship between the terms on the right (the independent variable) to Qt (the dependent variable. We find values of each variable be taking a random

### AIU Benefits Data: Regression, Lease Squares, Y-intercepts

See attached data file to complete this task. Prepare a report using Excel as your processing tool to process 3 simple regression analyses. Create a graph with the trend line displayed for each of the 3 different regressions. First run a regression analysis using the BENEFITS column of all data points in the AIU data set

### Simple Linear Regression Example

The annual salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest \$100. x y 2 53.5 5 56.3 9 59.8 14 6

### Statistics: Multiple Regression Equation

See the attached file. PG 2 -6 The US Navy selected 16 hospitals that were believed to be efficiently run. They conducted a regression analysis to evaluate the performance of the hospitals in terms of how many labor hours used relative to how many labor hours needed. Y= monthly labor hours required X1= monthly X-ray e

### Statistics:

See attached file. Accu-copiers Inc sells Accu 500 copy machines. As part of standard contract, they perform routine servicing of the copier. To obtain the time it takes to perform the routine service they collected 11 service calls. The service call information revealed the the following. Refer to Table 10C attached.