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
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
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,
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
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 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.
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
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
4. Solve the following Anova problem. R's represent gender and C's represent dietary groups. Alpha = .05. C1 C2 C3 3 7
For one of the first statistics exam, the coefficient of determination between hours studied and the grade earned was 80 percent. The standard error of estimate was 10. There were 20 students in the class. Develop an ANOVA table.
Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.05 significance level to test the claim that the different care categories have the same mean amount of greenhouse gas emission. Based on the results,
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.
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
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
Chapter 12 16. Studies show that groups of three people consistently outperformed the best of the individuals working alone on a letters to numbers substitution problem. The following data describe the number of trials needed to solve each problem for a sample of n = 15 groups and a sample of n = 15 individuals. Groups
What are advantages and disadvantages when using ANOVA method to analyze data?
What are the differences between a two-sample t-test and 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?
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
Consider an experiment with four groups, with eight values in each. For the ANOVA summary table below, fill in all the missing results: Below, fill in all the missing results: SOURCE DEGREES OF FREEDOOM SUM OF SQUARES MEAN OF SQUARE( variance) F among groups c-1 = ? SSA = ? MSA=80 F stat=? within gr
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
5 questions: Find the Critical values for the following statistics at .05... The Hypothesis: Rats use their whiskers when swimming was tested by placing 7 rats in three situations... Dunn(1990) conducted a study to assess the influence of exposure to "the silent scream" on college students' attitudes towards abortion. Ten students were tested before and after watching the video. Set up the appropriate analysis and... Gender discrimination in the workforce was investigated by selecting two opposite franchises in the fast food industry. Below are the number of males and females hired by these two franchises. Analyze the data and ... Some research supported the hypothesis that viewing television violence may lead to violent acts. Other research claims that these effects only occur in persons with aggression problems. Sixteen participants were assigned to one of two groups...
See attached file. Please provide detailed explanations and show all work.
2. Comparing the means of two independent populations: Normal-- End Aisle 22 52 t-Test: Two-Sample Assuming Equal Variances 34 71 52 76 Normal End Aisle 62 54 Mean 50.3 72 30 67 Variance 350.6777778 157.3333333 40 83 Observations 10 10 64 66 Pooled Variance 254.0055556 84 90 Hypot
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,
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
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
(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
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
49) If a quarterly seasonal index is 0.66, it implies that A. the other three quarter percentages will total 34% B. the quarter's sales are 6% above the yearly average C. the quarter's sales are 66% of the year total sales D. the quarter's sales are 66% of the yearly average 50) Given the trend equation Y' = 24
See attached Excel files. Calculations Looking for Single Regression Models Multiple Regression Model with ONLY statistically significant Coefficients Explanation of data collection, SOURCE of data, regression methodology and specific hypothesis tests F test, and T test (or p-value). Obtain a correlation matrix