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Analysis of Variance

ANOVA comparing average income at three levels of education

See attached data file. Question a: A random sample of 30 executives from companies with assets over $1 million was selected and asked for their annual income and level of education. The ANOVA comparing the average income among three levels of education rejected the null hypothesis. The Mean Square Error (MSE) was 243.7. The

Statistics: Multiple regression equation and ANOVA

Please help with the following problem See attached data file. Question 7: If there are four independent variables in a multiple regression equation, there are also four Choose the right answer: a. Y-intercepts. b. regression coefficients. c. dependent variables. d. constant terms. Question 8: A manager at a lo

Difference in days worked by employees in three departments

Problem 11.22-answer the Research Question using ANOVA. 11.22 The XYZ Corporation is interested in possible differences in days worked by salaried employees in three departments in the financial area. A survey of 23 randomly chosen employees reveals the data shown below. Because of the casual sampling methodology in this surv

ANOVA and Regression Analysis

1. ANOVA: Please review EXCEL DATA tab and DATA NOTES. Three columns from that dataset are of interest to us now: total admissions, region and control. Admissions are the number of patients admitted in a year, region is the geographical location of the hospital (see tabulation below) and control is the type of ownership of th

Statistics questions 12, 16, 18, chapter 13

12. A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. a. How many treatment conditions were compared in the study? b. What was the total number of participants in the study? 16. A pharmaceutical company has developed a drug that is expected to reduce hunger. To test the drug,

Statistics: ANOVA, Relationships, and Regression

Please see file attached. Obtain bivariate data from the Excel spreadsheet - Determine which is the independent and which is the dependent variable. - Create a scatter diagram. - Determine the coefficient of correlation and interpret. - Determine the equation of the regression line and explain. - Interpret each value i

Effect of Reward&Punishment on Employee Communication

14 You are interested in the effect of reward VS punishment on your communications with your employees. To test the effect you setup a study, which analyzes how this effects communication. You divide employees into groups and test their knowledge of recent communications. The results follow: Table 1: Summary of the A

Discuss which analysis of variance should be applied

Discuss which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests.

Analysis of Variance

1. In a completely randomized design, seven experimental units were used for each of the five levels of the factor. Complete the following ANOVA table: Source of variation sum of squares degrees of freedom mean square f p value Treatments 300 Error Total

ANOVA Analysis

Katie is studying aggression among adolescent girls. She believes that there is a relationship between the level of interaction a girl has with her mother and her level of aggression. She has identified 5 girls who fall into each of 4 interaction levels and has measured their aggression scores. Her data are given below. No In

Think of a question that can be tested using ANOVA

ANOVA can be very ueful tool and is one of the more powerful statistical techniques. Think up a question that one might encounter at his or her workplace or elsewhere that would be amenable to testing via ANOVA. One should actually run the analysis, including how you might get the data, sampling issues, etc.

Analysis of Variance (ANOVA): Is the number of cylinders related to gas milegae?

See attached file for clarity. Analysis of Variance My brother is interested in buying a car, but knows very little about them. He has gone to a used car dealership and looked at cars. His one criteria is that the car gets good gas mileage. The car salesman tells him that the number of cylinders in a car has nothing to do

Howell data set in SPSS: Using selected variables, perform an ANOVA test

See attached data set file. Open the Howell data set in SPSS. Using hypothesis testing (Statistics used for behavioral science), select any appropriate independent variable with three (3) or more levels and any appropriate dependent variable from the Howell data set. Using the variables you selected, perform an ANOVA (Anal

ANOVA Hypothesis Testing

In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics?

ANOVA: Computer Anxiety Rating Scale (CARS)

The Computer Anxiety Rating Scale (CARS) measures an individual's level of computer anxiety, on a scale from 20 ( no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the objectives of the study was to determine whether there are differences in the amou

Solve the following CPM/PERT Network Analysis problem using excel

Solve the following CPM/PERT Network Analysis problem: Given the following network and activity time estimates, determine (ES, LS, EF, LF) earliest and latest activity times, slack, the expected project completion time and variance, and the probability that the project will be completed in 27 days or less. Time Estimates (D

The federal government recently granted funds for a special program designed to reduce crime in high-crime areas. A study of the results of the program in 8 high-crime areas of Miami, Florida, yielded the following results: Number of crimes by are A B C D E F G H Before 14 7 4 5 17 12 8 9 After 2 7 3 6 8 13 3 5 Has there been a decrease in the number of crimes since the inauguration of the program? Use the .01 significance level. Estimate the P-value

1. Exercise 26 (p.391). Please answers the following questions according the problem, instead of the questions asked in the textbook. The federal government recently granted funds for a special program designed to reduce crime in high-crime areas. A study of the results of the program in 8 high-crime areas of Miami, Florida,

ANOVA & Least Squares

Look at the data below for the income levels and prices paid for cars for ten people: Annual Income Level Amount Spent on Car 38,000 12,000 40,000 16,000 117,000 41,000 17,000 3,500 23,000

One-way ANOVA: Fill in the missing items and state a conclusion

See attached file. (12.32) For the following summary table for a one-way ANOVA, fill in the missing items (indicated by asterisks), identify the null and alternative hypotheses, then use the 0.025 level of significance in reaching a conclusion regarding the null hypothesis. Variation

Study of contributions made by clerical workers to United Way

(12.27) A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollow amounts of their contributions are as follows: Firm1 Firm2 Firm3 199 108 162

Statistics: Questions about the F test

1. Why are you no longer directly comparing sample means? 2. How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate? 3. What is the difference between a within-groups and a between-groups variance? 4. If F is significant, why should you follow up with a post hoc test? 5. Why don't you use