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# Analysis of Variance

### Using analysis of variance

West Coast Bell System James Todd is the recently appointed director of employee benefits for West Coast Bell, a regional telephone system. The West Cost Bell medical benefits system insures over 60,000 employees and dependents. Over the last 5 years its medical costs have been increasing by over 20% annually. James knows th

### Two Way Analysis of Variance

The effects of developer strength (factor A) and development time (factor B) on the density of photographic plate film were being studied. Two strengths and two development times were used, and four replicates in each of the four cells were evaluated. The results (with larger being best) are shown in the attached Excel document

### Hypothesis Testing multiple population

Hypothesis Testing A teacher would like to use a new tutorial to teach the students about trade. As an experiment he randomly selected 18 students and randomly assigned them to one of three groups which include either a PowerPoint presentation created by the faculty, X Presentation created by the faculty, or a well-known t

### Analyzing with ANOVA

The table depicts a two-way ANOVA in which gender has two groups (male and female), marital status has three groups (married, single never married, divorced), and the means refer to happiness scores (n = 100): What is/are the independent variable(s)? What is/are the dependent variable(s)? What would be an appropriate null

### Two Way ANOVA and Replication

When running an analysis of variance (ANOVA): two-factor with replication (two-way test), you get a p-value for the interaction effect, indicating whether it is statistically significant. If it is significant, you should not try to interpret the main effects at all. Explain why this is the case, giving an example to illustrate y

### Creating and assessing a regression equation

A sample of 30 computer hardware companies taken from Stock Investor Pro provided the data in the Excel sheet. This data included the price per share, book value per share, and the return on equity per share for each. 1. Develop an estimated regression equation that can be used to predict the price per share given the book va

### Sammy's Subs Sales: State the null hypothesis, and explain how you determined whether to reject it.

Scenario 3 To complete this scenario, use the Sammy's Subs Sales Data Excel file linked in the Resources. Sammy, the owner of a fast food chain called Sammy's Subs, wants to know whether the levels of daily sales are different between his shop in Edina and the one in Richfield. He records sales in each shop for a month, in the

### Null and Alternative Hypotheses Problems

The Haines Lumber Company makes plywood for the furniture industry. One product it makes is 3/4 - inch oak veneer panels. It is very important that the panels conform to the 3/4 - inch specification. Each hour, 5 panels are selected at random and measured. After 4 hours a total of 20 panels have been measured. The thickness meas

### ANOVA comparing stock prices

We have been doing a group project on the company Pfizer Pharmaceuticals. We are comparing Pfizer to Merck, Abbott, and the S&P. Since no group evaluated their stock analysis, this assignment requires you to do so. I hinted that you need to standardize your data. This is important when comparing stocks that trade at differen

### An Analysis of Variance Question

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for University X was a mean of 5 hours and an estimated po

### ANOVA

The following ANOVA summary data are the result of a regression with sales per year (dependent variable) as a function of promotion expenditures per year (independent variable) for a toy company. F = ? MSA = 34,276 MSE = 4,721 The degrees of freedom are 1 for the numerator and 19 for the denominator. Is the relationship

### Osteoarthritis (OA) Practice Questions for the Baird and Sands Research.

Source: Baird, C. L., & Sands, L. (2004). A pilot study of the effectiveness of guided imagery with progressive muscle relaxation to reduce chronic pain and mobility difficulties of osteoarthritis. Pain Management Nursing, 5(3), 97–104. 1. The researchers found a significant difference between the two groups (control and tr

### A study reported in the Journal of the American Medical Association investigated the cardiac demands of heavy snow shovelling

A study reported in the Journal of the American Medical Association investigated the cardiac demands of heavy snow shovelling. Ten healthy mean underwent exercise testing with a treadmill and a cycle ergometer modified for arm cranking. The men then cleared two tracts of heavy, wet snow by using a lightweight plastic shovel and

### A manufacturing company designed a factorial experiment

A manufacturing company designed a factorial experiment to determine whether the number of defective parts produced by two machines differed and if the number of defective parts produced also depended on whether the raw material needed by each machine was loaded manually or by an automatic feed system. The following data give th

### Four different paints are advertised as having the same drying time

Four different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. The following data were obtained. Paint 1 Paint 2 Paint 3 Paint 4 128 144 1

### Two easy business stats questions (Econ based)

Just finished my homework but just wanted to have someone look it over and make sure that I'm doing it correctly. Interpreting the values is easy enough when you run ANOVA but I'm more interested in making sure that my hypotheses and conclusions are correct. I'm attaching the original assignment and my answer sheet in Excel (

### ANOVA: level of significance

** Please see the attached file for the data ** Thank you in advance. In the attached file, named Savings Rate data to figure out the below is annotated. The .xls contains the yields for a money market account, a one-year certificate of deposit (CD), and a five-year CD for 23 banks in the metropolitan New York area, as

### SPSS-ANOVA Treatment Conditions

Hi Martin. It is Tuesday already. I have the next set ready for your help. I need to turn it in before midnite, tonite. Can you help me by then? Following, you will find the exact instructions: 1). Compute a sex by teatment condition ANOVA, using Post-Treatment RCMAS as your dependent variable. 2). Report your ana

### SPSS-ANOVA Comparison

Hi Martin! I am needing help with this portion of my assignment, please. I believe you may have the info in a file allready, but I will send the original so you will have all the nececssary info needed. Here are the instructions following below: 1. Conduct an ANOVA comparing the anxiety levels (at post-test only) of par

### ANOVA Analysis Of College Student's Age Survey

Hi Martin! Ok, this little project is dealing with ANOVA tests. I have some data that I have collected from a range of students at freshman to senior levels, and need the ANOVA tests and interpretation results for them. Here are the exact instructions: 1). You are required to visit a local college , find out the age gro

### Experimenting with Different Octane Gases

Case Study - The Higher the Better? Max knew that gas companies advertise the higher octane of gas result in higher gas mileage? He wanted to know if the higher price would be offset by the higher amount of miles per gallon. So, he found some friends who would help him with an experiment. He asked 9 of his buddies (total o

### Test the claim that the company pays women less than men for similar jobs

See the attached file for proper format. A large company is organized into three functional areas: manufacturing, marketing, and research and development. The employees claim that the company pays women less than men for similar jobs. The company randomly selected four males and four females in each area and recorded

### Scenario regarding ANOVA, multiple regression

4. Because the school board's primary concern is whether or not the experimental curriculum led to better standardized test scores, your next step is to conduct a simple analysis comparing test scores from schools with the old curriculum with the test scores from schools with the new/experimental curriculum. a) Conduct an ANOV

### Statistics Problems

See attached files. Can you please answer these but in addition please show entire work process & formula arrived at in Excel. The following problems I am having difficulty with: 1, 2, 3, 7, 8. 1. The operations manager at a light bulb factory wants to determine whether there is any difference in the mean life expectan

### Two Factor ANOVA Table

12. To compare five different formulations of fuel, seven different armored vehicles drove the identical route once with each fuel type. For each vehicle/fuel-type combination a fuel cost-of-operation value was determined. These numbers were analyzed with standard Two-Factor ANOVA yielding the table which is partially filled

### Method for Computing Test Statistics for ANOVA in SPSS

See the attached file. 2. A new over the counter pain relief is on the market, Becanol. The claims suggest that it works better than other pain medicine, Tyvil and Bayleve. You want to be able to provide your own opinion about the Becanol to your patients who ask so you conduct your own assessment. You ask 150 of your pati

### three way anova spss dataset computations

for the given SPSS dataset: Independent variables (IVs): age, gender, and tenure. The IVs should be referred to as Factor A, Factor B, and Factor C, where: Factor A = Age (younger or older); Factor B = Tenure (short-term or long-term), and; Factor C = Gender (male and female). One dependent variable (DV) -resistance to c

### ANOVA Table Treatments Analysis

In a completely Randomized Experimental design, 11 experimental units were used for each of the 3 treatments (total 33 units). Part of the ANOVA Table is shown below. Source of Sum of squares degree of Mean F Variation

### Confidence Interval & ANOVA

Problem Set 1: Chapter 12, problems 2, 4, 6, 12; Chapter 13, problems 4, 10, 14, 20, 26 Chapter 12 2. Explain why it would not be reasonable to use estimation after a hypothesis test for which the decision was to 'fail to reject Ho". 4. A researcher has constructed an 80% confidence interval of µ = 45 +/- 8, using a sa