Anova Testing Essay

1342 words - 5 pages

In today's highly competitive business world, researchers and analysts must maintain degrees of high standards in the research and evaluation departments. Staying on top of the latest marketing techniques, keeping abreast of consumer demands to ensure the highest quality customer service, achieving cost affective productivity, and maintaining quality production are just a few of the things that companies constantly research and analyze. Researching, testing, and analyzing can help ensure management officials that their company will be successful in today's business world.Description and Identifying the DataDominion Building Products operates six service centers within the United States. These centers are located in Adel, IA, Ceres, CA, Birmingham, AL, Elkhart, IN, and two in Houston, TX. The primary ranking instrument for each service center is the total sales dollars tabulated at the end of each month. However, Dominion does track another factor that will further help determining service center rankings among the lowest ranked centers. That is the number of sales orders processed by the service centers each month.Birmingham and the two service centers in Houston all have similarly high sales dollars and process a high volume of sales orders each month. The number of sales orders written differs from the number of sales orders processed. For example, a written order in March may not ship until April. Once an order ships, the sales order is processed and counted as a completed sales order for that month.While Adel, Ceres, and Elkhart are similar in size, the dollar volumes for each location can fluctuate from month-to-month enough so there is no clear ranking among these centers. However, it seems the yearly totals in the past for sales orders processed would indicate that each of these three service centers produces a dissimilar amount of processed sales orders each month. Therefore, the question could arise if there is any difference in the mean amount of orders processed each month among these three service centers. Based on the monthly total of sales orders processed by the Adel, Ceres, and Elkhart service centers from 2005, an ANOVA test will help answer this question.Examining the ANOVA TestAn ANOVA (Analysis of Variance), sometimes called an F test, is closely related to the t test. The major difference is that, where the t test measures the difference between the means of two groups, an ANOVA test evaluates the difference between the means of two or more groups. A one-way ANOVA, or single factor ANOVA, tests differences between groups that are only classified on one independent variable. Multiple independent variables can also used to test for interactions using factorial ANOVA. The advantage of using ANOVA rather than multiple t tests is that it reduces the probability of a Type I error. Making multiple comparisons increases the likelihood of finding something by chance and making a Type I error.From the example of Dominion Building...

Find Another Essay On ANOVA Testing

Statistical Methods and Probability Essay

1245 words - 5 pages statistical significance. For an ANOVA problem, the null hypothesis is that the population means are equal; the alternative hypothesis is that they are not. If the null hypothesis is rejected, further testing would be required to determine which sample(s) are not part of the population. Required conditions to perform a one-way ANOVA test include testing one independent variable, the categories of the independent variable must be independent, and

Nonparametric Analysis of Interactions

1969 words - 8 pages This review targeted different techniques used in the analysis of experiments, when no assumptions about the underlying distribution of the observations is made and interactions are present. Table 1 presents a review of nonparametric methods for factorial designs with interactions as well as hypothesis testing. The search engines used were Web of ScienceTM and Google ScholarTM. The search was focused on interactions and univariate factorial

Orthogonal Array Experimental Design

1299 words - 5 pages they convey [2]⁠. If at least two observations are taken for each treatment, an FFD is capable of testing the significance of all main effects and interactions. If only 1 observation is taken for each sample, then the highest-order interaction must be used as the error term in the ANOVA. However, FFD's are rarely used in practice, due to the large number of runs they typically require. This is especially true in catalyst synthesis, where the

Statistical Methods in Quality Management: Descriptive Statistics

1060 words - 4 pages data may be affecting both variables. The ANOVA method of analyzing quality data is useful for comparing the differences in the means of two or more data sets. For example, it can provide information as to whether a change to a process has produced less variance by comparing the mean of the data before and after the change has taken place. A benefit of ANOVA is its usefulness for testing a hypothesis as to whether the means of two samples are

Nonparametric Hypothesis Testing

1561 words - 6 pages clerical, management or sales positions in the manufacturing industry would make a higher or lower salary if they were to hold the same positions in other industries. For the purposes of testing Team B used data provided by Wages and Wage Earners Data Set (2008). The ANOVA test results failed to reject the following null hypothesis: Ho = Employees in the manufacturing field, who hold clerical, management, or sales positions, have a mean salary that is

Optimization of deep cryogenic treatment to reduce wear loss of 4140 chrome molybdenum steel using Taguchi technique

2682 words - 11 pages ), soaking period (B), tempering temperature(C) and tempering period (D). The optimum levels and the interaction of the deep cryogenic treatment parameters for 4140steel are arrived using L27 Taguchi orthogonal design. The experimental result shows that hardening temperature is the most significant factor in the deep cryogenic treatment process. Moreover, ANOVA analysis shows that the percentage contribution of hardening temperature is 17.34% when

Metabolic Control

900 words - 4 pages the testing of the first hypothesis, which referred to a decreased mean value of the HbA1C in the experimental group, the researchers applied ANOVA of repeated measures. There was a second test applied, the selected multivariate test, the Wilks Lambda. In this test, p=.003. The result showed that there was a significant difference between the two groups and that difference was present in the second, fourth, and fifth measurement. The second

Antibacterial activity of honey on Staphylococcus aureus: Raw versus Processed (store bought) honey

2449 words - 10 pages antibacterial properties, by testing the effect/impact it has on Staphylococcus aureus as compared to raw honey, which we know does have some antibacterial activity against this bacterium. This will show whether or not the honey that we buy in the stores is truly just honey or if there were processes that removed/added ingredients in the honey, the ingredients of our particular honey however are not available on the label of the jar, instead we would need

Nonparametric Hypothesis Testing Paper week 4

1235 words - 5 pages earners whose positions may allow for overtime, while professional wage earners, especially those in management positions, are more likely to be classified as exempt and not entitled to overtime pay for overtime hours worked. The data received from the Wilcoxon-Mann/Whitney Test contradicts the data that was received from the ANOVA test completed in Team C抯 research paper completed last week (Two Sample Hypothesis Testing. As stated, the

Annual Land-based Overseas Filipino Workers Remittances from Hongkong and Singapore for the years 1989 to 2010

1681 words - 7 pages the cumulative frequency is depicted in the Ogive (Figure 4). Figure 3. Histogram – Hongkong Figure 4. Ogive - Hongkong III. Inferential Statistics According to Blumer (2011, p.809), hypothesis testing is “a decision-making process for evaluating claims about a population.” It follows a five-step procedure. For the data gathered, the mean vs. hypothesized value hypothesis test is used. The chosen level of significance 95% because the

Antiviral Drug Susceptibility of Influenza Viruses

1661 words - 7 pages ) influenza virus infection in mice” (Bantia, et al., 2011). The study performed in 2009 by Bantia, Kellogg, Parker, Upshaw, Ilyushina, and Babu used a one-way analysis of variance (ANOVA) by giving a single intramuscular injection of one of the following drugs: Peramivir, Zanamivir, or Oseltamivir (Tamiflu) in a variety of dosages to determine drug efficacy in mice infected with the H1N1 influenza virus that caused the 2009 Pandemic in the

Similar Essays

Anova Testing Essay

657 words - 3 pages investigation. In addition, it must be taken into account that none of the team members that created and administered the study are professionally trained researchers. This study would best serve as a point of reference for further studies than be taken at face value and used as valid data.In conclusion, we can see that ANOVA testing in this situation can be useful in determining the relationship between population samples.

Anova Testing Essay

451 words - 2 pages University of PhoenixResearch and Evaluation The Army would like to relocate me. My choices are Georgia, Arizona and California. I will determine the most cost efficient place to live. Since transportation is a necessity in today’s world I thought that I would start with the prices of gas. I would like to know if the mean gas prices are equal in all three states.I will perform the Analysis of Variance (ANOVA) test. The reason I chose this

Applying Anova And Nonparametric Tests Simulation

719 words - 3 pages Applying ANOVA and Nonparametric Tests SimulationUniversity of PhoenixResearch and Evaluation IIRES 342ContentsSubjectPageIntroduction………………………………………………………………………3Lessons Learned……….………...………&hellip

Anova Paper

1219 words - 5 pages ANOVA PAGE 7 ANOVATeam BRES 342University of PhoenixMr. McMahonFebruary 27, 2007ANOVAResearch IssueThis research paper will be discussing the use of the ANOVA hypothesis testing system. Team chose a research subject dealing with the price of groceries. The members of the team went to different grocery stores to compare prices of certain items. Team is going to perform an ANOVA hypothesis test to determine if there is a difference in the retail